Reaction Chemistry - GRE
Card 0 of 132
Which of the following is true regarding the solubility product constant, 
, for a reaction in the form:
Which of the following is true regarding the solubility product constant,
To determine the solubility product constant, we only need the concentrations and coefficients of the ions. The effective concentration of any pure substance (solid, liquid, or gas) is equal to one by definition, so does not influence the value of 
. The equation for the solubility product constant of this reaction is:
The units of the solubility product constant will depend on the coefficients of the products. 
will be a constant for the reaction, and will not change as more solid dissolves or as the reaction progresses.
To determine the solubility product constant, we only need the concentrations and coefficients of the ions. The effective concentration of any pure substance (solid, liquid, or gas) is equal to one by definition, so does not influence the value of
The units of the solubility product constant will depend on the coefficients of the products.
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What happens when a solution of 
is added to a solution of 
?
What happens when a solution of
The chemical reaction that would occur is provided below:
This type of reaction is called a double displacement reaction in which there is an exchange of ions between two compounds. This type of reaction usually results in the formation of a precipitate or gas. In terms of the positive ions, the 
switch places 
to form two new products.
The chemical reaction that would occur is provided below:
This type of reaction is called a double displacement reaction in which there is an exchange of ions between two compounds. This type of reaction usually results in the formation of a precipitate or gas. In terms of the positive ions, the
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Which of the following types of reactions best describes the following reaction:
Which of the following types of reactions best describes the following reaction:
The type of reaction given is termed a combustion reaction. A combustion reaction is one that involves a substance reacting with molecular oxygen. For combustion reactions involving a hydrocarbon as given in the example, the major products are carbon dioxide and water. The word combustion is a synonym for burn.
The type of reaction given is termed a combustion reaction. A combustion reaction is one that involves a substance reacting with molecular oxygen. For combustion reactions involving a hydrocarbon as given in the example, the major products are carbon dioxide and water. The word combustion is a synonym for burn.
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Determine the theoretical yield in grams of 
produced if 5.6 grams of 
is reacted with excess 
.
Determine the theoretical yield in grams of
Convert the number of grams of 
to moles:
Based on the chemical equation 1 mole of 
is produced for every 2 mole of 
reacted.
Therefore: 
Convert the moles of 
to grams:
Convert the number of grams of
Based on the chemical equation 1 mole of
Therefore:
Convert the moles of
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Determine the percentage yield of the reaction given if 40.0 grams of 
is heated to give 15.0 grams of 
.
Determine the percentage yield of the reaction given if 40.0 grams of
In chemistry, percentage yield is a term used to quantify the efficiency of a chemical reaction. In order to calculate this quantity, the value for the actual yield and theoretical yield is needed. The actual yield is the amount of product obtained during a chemical reaction. The theoretical yield is the maximum amount of product possible to be obtain by a chemical reaction which is based on the amount of reactants used. Below is the formula needed to calculate the percentage yield.
Convert the number of grams of 
to moles:
Based on the chemical equation 1 mole of 
is produced for every 1 mole of 
reacted.
Convert the moles of 
to grams:
In chemistry, percentage yield is a term used to quantify the efficiency of a chemical reaction. In order to calculate this quantity, the value for the actual yield and theoretical yield is needed. The actual yield is the amount of product obtained during a chemical reaction. The theoretical yield is the maximum amount of product possible to be obtain by a chemical reaction which is based on the amount of reactants used. Below is the formula needed to calculate the percentage yield.
Convert the number of grams of
Based on the chemical equation 1 mole of
Convert the moles of
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For the reaction given, identify the type of reaction taking place.
For the reaction given, identify the type of reaction taking place.
A displacement reaction is one in which an atom, ion or molecule moves from one compound to another to replace an atom, ion or molecule in another compound. In the reaction given, 2 
ions move from 2 moles of 
to 
to form 
.
A displacement reaction is one in which an atom, ion or molecule moves from one compound to another to replace an atom, ion or molecule in another compound. In the reaction given, 2
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Determine the percentage yield of the reaction given if 21.0 grams of 
is reacted with excess 
to give 10.2 grams of 
.
Determine the percentage yield of the reaction given if 21.0 grams of
In chemistry, percentage yield is a term used to quantify the efficiency of a chemical reaction. In order to calculate this quantity, the value for the actual yield and theoretical yield is needed. The actual yield is the amount of product obtained during a chemical reaction. The theoretical yield is the maximum amount of product possible to be obtain by a chemical reaction which is based on the amount of reactants used. Below is the formula needed to calculate the percentage yield.
Convert the number of grams of 
to moles:
Based on the chemical equation 1 mole of 
is produced for every 1 mole of 
reacted.
Convert the moles of 
to grams:
In chemistry, percentage yield is a term used to quantify the efficiency of a chemical reaction. In order to calculate this quantity, the value for the actual yield and theoretical yield is needed. The actual yield is the amount of product obtained during a chemical reaction. The theoretical yield is the maximum amount of product possible to be obtain by a chemical reaction which is based on the amount of reactants used. Below is the formula needed to calculate the percentage yield.
Convert the number of grams of
Based on the chemical equation 1 mole of
Convert the moles of
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Determine the percentage yield of the reaction given if 12.6 grams of 
is reacted excess 
to give 10.4 grams of 
.
Determine the percentage yield of the reaction given if 12.6 grams of
In chemistry, percentage yield is a term used to quantify the efficiency of a chemical reaction. In order to calculate this quantity, the value for the actual yield and theoretical yield is needed. The actual yield is the amount of product obtained during a chemical reaction. The theoretical yield is the maximum amount of product possible to be obtain by a chemical reaction which is based on the amount of reactants used. Below is the formula needed to calculate the percentage yield.
Convert the number of grams of 
to moles:
Based on the chemical equation 1 mole of 
is produced for every 1 mole of 
reacted.
Convert the moles of 
to grams:
In chemistry, percentage yield is a term used to quantify the efficiency of a chemical reaction. In order to calculate this quantity, the value for the actual yield and theoretical yield is needed. The actual yield is the amount of product obtained during a chemical reaction. The theoretical yield is the maximum amount of product possible to be obtain by a chemical reaction which is based on the amount of reactants used. Below is the formula needed to calculate the percentage yield.
Convert the number of grams of
Based on the chemical equation 1 mole of
Convert the moles of
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For the reaction given, identify the type of reaction taking place.
For the reaction given, identify the type of reaction taking place.
A displacement reaction is one in which an atom, ion or molecule moves from one compound to another to replace an atom, ion or molecule in another compound. In the reaction given, 
ion moves from 
to 
. Also, 
ion moves from 
to 
.
A displacement reaction is one in which an atom, ion or molecule moves from one compound to another to replace an atom, ion or molecule in another compound. In the reaction given,
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For the reaction given, identify the type of reaction taking place.
For the reaction given, identify the type of reaction taking place.
A displacement reaction is one in which an atom, ion or molecule moves from one compound to another to replace an atom, ion or molecule in another compound. In the reaction given, 
ion moves from 
to 
to form 
.
A displacement reaction is one in which an atom, ion or molecule moves from one compound to another to replace an atom, ion or molecule in another compound. In the reaction given,
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Determine whether or not solid aluminum reacts with aqueous zinc chloride. If it does, determine the balanced equation for the reaction.
Determine whether or not solid aluminum reacts with aqueous zinc chloride. If it does, determine the balanced equation for the reaction.
When we check the activity series, it is fairly easy to see that aluminum metal is more reactive than zinc metal. So, in this case, the two metals undergo a redox reaction, where the aqueous 
is reduced to solid 
, and the solid 
is oxidized to aqueous 
. These charges are the common oxidation states for zinc and aluminum and should be memorized.
Because 
is the new species, it bonds with 3 
ions. The unbalanced equation is:
We note that there are 2 chlorine atoms on the left and 3 chlorine atoms on the right. To balance, we use a 3 coefficient on the left and a 2 coefficient on the right. This gives a total of 6 chlorine atoms on eahc side.
However, now we have also increased the amounts of zinc and aluminum. We copy the necessary coefficients to balance those—2 for aluminum on the left, 3 for zinc on the right—and we are done:
When we check the activity series, it is fairly easy to see that aluminum metal is more reactive than zinc metal. So, in this case, the two metals undergo a redox reaction, where the aqueous
Because
We note that there are 2 chlorine atoms on the left and 3 chlorine atoms on the right. To balance, we use a 3 coefficient on the left and a 2 coefficient on the right. This gives a total of 6 chlorine atoms on eahc side.
However, now we have also increased the amounts of zinc and aluminum. We copy the necessary coefficients to balance those—2 for aluminum on the left, 3 for zinc on the right—and we are done:
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What is the net ionic equation for the ion exchange reaction between ferrous sulfate and calcium iodide? Assume all compounds are soluble.
What is the net ionic equation for the ion exchange reaction between ferrous sulfate and calcium iodide? Assume all compounds are soluble.
First, we must know what ferrous sulfate is. Ferrous refers to 
, and sulfate has the formula 
. When we combine the two together we get 
.
Calcium is a divatent cation and iodide is a monovalent anion, so their salt is 
. The ion exchange reaction is then:
First, we must know what ferrous sulfate is. Ferrous refers to
Calcium is a divatent cation and iodide is a monovalent anion, so their salt is
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Select the net ionic equation from this molecular reaction:
Select the net ionic equation from this molecular reaction:
The net ionic equation is derived by removing all spectator ions from the total ionic equation (in which all ions are listed). To put it another way, the net ionic equation involves only the ions that participate in a reaction which, in this case, is the precipitation of barium sulfate.
Begin by writing all aqueous compounds in their dissociated (ionic) forms.
Cancel out any ions that appear in equal quantities on both sides of the equation. In this case, we can cancel the nitrate and potassium ions.
This is our net ionic equation.
The net ionic equation is derived by removing all spectator ions from the total ionic equation (in which all ions are listed). To put it another way, the net ionic equation involves only the ions that participate in a reaction which, in this case, is the precipitation of barium sulfate.
Begin by writing all aqueous compounds in their dissociated (ionic) forms.
Cancel out any ions that appear in equal quantities on both sides of the equation. In this case, we can cancel the nitrate and potassium ions.
This is our net ionic equation.
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What is the balanced chemical equation for the combustion of butane 
?
What is the balanced chemical equation for the combustion of butane
Combustion is the chemical reaction of a hydrocarbon with molecular oxygen, and it always produces carbon dioxide and water. Knowing the reactants and products, the unbalanced equation must be:
We start by balancing the hydrogens. Since there are 10 on the left and only 2 on the right, we put a coefficient of 5 on water.
Similarly, we balance carbons by putting a 4 on the carbon dioxide.
To find the number of oxygens on the right, we multiply the 4 coefficient by the 2 subscript on O (which gets us 8 oxygens) and then add the 5 oxygens from the 5 water molecules to get a total of 13. The needed coefficient for 
on the left would then have to be 13/2.
Because fractional coefficients are not allowed, we mutiply every coefficient by 2 to find our final reaction:
Combustion is the chemical reaction of a hydrocarbon with molecular oxygen, and it always produces carbon dioxide and water. Knowing the reactants and products, the unbalanced equation must be:
We start by balancing the hydrogens. Since there are 10 on the left and only 2 on the right, we put a coefficient of 5 on water.
Similarly, we balance carbons by putting a 4 on the carbon dioxide.
To find the number of oxygens on the right, we multiply the 4 coefficient by the 2 subscript on O (which gets us 8 oxygens) and then add the 5 oxygens from the 5 water molecules to get a total of 13. The needed coefficient for
Because fractional coefficients are not allowed, we mutiply every coefficient by 2 to find our final reaction:
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What will be the coefficient for 
once the following equation is balanced?
What will be the coefficient for
In the unbalanced equation from the question, the reactant side contains two hydrogen atoms and one oxygen atom. On the product side of the equation, there are four hydrogens and two oxygen atoms. So for every oxygen atom there are two hydrogen atoms giving a ratio of 
(oxygen : hydrogen). Putting a coefficient of two in front of the water molecule on the reactant side of the equation balances the equation. Therefore, there are four hydrogen and two oxygen atoms on both sides of the balanced chemical equation.
In the unbalanced equation from the question, the reactant side contains two hydrogen atoms and one oxygen atom. On the product side of the equation, there are four hydrogens and two oxygen atoms. So for every oxygen atom there are two hydrogen atoms giving a ratio of
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When 15.5 grams of 
is used in the given reaction, how many moles of 
is produced?
When 15.5 grams of
We must first calculate the molecular weight of 
to use as a conversion factor:
For every mole of reacted, one mole of 
is produced.
Therefore, 0.1092 moles of 
is produced.
We must first calculate the molecular weight of
For every mole of
Therefore, 0.1092 moles of
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When 20.0 grams of 
is used in the given reaction, how many moles of 
is produced?
When 20.0 grams of
We must first calculate the molecular weight of to use as a conversion factor:
For every 1 mole of 
reacted, 2 moles of 
is produced.
Therefore,the number of moles of 
produced will be double the number of moles of 
used up in the reaction:
We must first calculate the molecular weight of
For every 1 mole of
Therefore,the number of moles of
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What is the smallest whole-number coefficient that can be designated to the water molecule that would balance the chemical equation given?
What is the smallest whole-number coefficient that can be designated to the water molecule that would balance the chemical equation given?
The number of atoms on the reactant side of the chemical equation are:
The number of atoms on the product side of the chemical equation are:
In a balanced chemical equation, the total number of atoms of each element must be equal on the reactant and product side of the chemical equation. There is one more oxygen and two more hydrogen atoms on the reactant side of the chemical equation. Giving the water molecule on the product side of the chemical equation would balance the chemical equation so that both sides contain six oxygens and five hydrogens:
The number of atoms on the reactant side of the chemical equation are:
The number of atoms on the product side of the chemical equation are:
In a balanced chemical equation, the total number of atoms of each element must be equal on the reactant and product side of the chemical equation. There is one more oxygen and two more hydrogen atoms on the reactant side of the chemical equation. Giving the water molecule on the product side of the chemical equation would balance the chemical equation so that both sides contain six oxygens and five hydrogens:
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What is the smallest whole number coefficient that can be designated to the 
molecule that would balance the chemical equation given?
What is the smallest whole number coefficient that can be designated to the
The process of balancing a chemical equation is called "balancing by inspection" which is done by trial and error. The easiest way to approach the problem given is by balancing the species containing an element with the most complicated formula occurring in one reactant and one product. In this case, we can either begin by balancing the carbon or hydrogen in the propane molecule. Let's start with the carbon by adding a coefficient of 3 to the carbon dioxide molecule on the product side of the equation which gives:
Let's now balance the hydrogens by adding a coefficient of 4 to the product side of the equation:
Lastly, we can balance the number of oxygens in the reaction:
The process of balancing a chemical equation is called "balancing by inspection" which is done by trial and error. The easiest way to approach the problem given is by balancing the species containing an element with the most complicated formula occurring in one reactant and one product. In this case, we can either begin by balancing the carbon or hydrogen in the propane molecule. Let's start with the carbon by adding a coefficient of 3 to the carbon dioxide molecule on the product side of the equation which gives:
Let's now balance the hydrogens by adding a coefficient of 4 to the product side of the equation:
Lastly, we can balance the number of oxygens in the reaction:
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If 
of 
is used for the reaction given, how many grams of 
was formed?
If
Based on the molecular equation, for every 1 mole of 
reacted, 1 mole of 
is formed as a product. Using dimensional analysis, we can use this relationship to determine the moles of reacted:
We must calculate the molecular weight of 
:
To calculate the number of grams of 
, we need to convert the number of moles of 
to grams using the molecular weight as a conversion factor.
Based on the molecular equation, for every 1 mole of
We must calculate the molecular weight of
To calculate the number of grams of
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