Practice Product in Chemistry

Use these practice problems to test your method after reviewing the concept explanation and worked examples.

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Quick Recap

A product is a substance that is formed as the result of a chemical reaction.

What you end up with after the reaction — the new stuff that gets made from the ingredients.

Showing a random 20 of 50 problems.

Example 1

medium
In 2Al+3Cl2→2AlCl32\text{Al} + 3\text{Cl}_2 \to 2\text{AlCl}_3, how many moles of product form from 1.51.5 mol Cl2\text{Cl}_2 (excess Al)?

Example 2

medium
Predict the products of the neutralization H2SO4+2KOH→ ?\text{H}_2\text{SO}_4 + 2\text{KOH} \to \,?

Example 3

easy
In the synthesis reaction 2Mg+O2→2MgO2\text{Mg} + \text{O}_2 \to 2\text{MgO}, name the product.

Example 4

medium
A precipitate forms when AgNO3(aq)AgNO_3(aq) meets NaCl(aq)NaCl(aq). Name the solid product and its state symbol.

Example 5

medium
In Mg(s)+CuSO4(aq)→MgSO4(aq)+Cu(s)\text{Mg(s)} + \text{CuSO}_4(aq) \to \text{MgSO}_4(aq) + \text{Cu(s)}, identify the solid product and explain why it is solid.

Example 6

medium
In 2KClO3→2KCl+3O22\text{KClO}_3 \to 2\text{KCl} + 3\text{O}_2, how many moles of O2\text{O}_2 are produced from 0.400.40 mol KClO3\text{KClO}_3?

Example 7

hard
Gas test: an unknown reaction produces a gas that turns limewater milky. What is the gas, and write a balanced equation for the limewater test.

Example 8

medium
Combustion of 1 mol CH4CH_4 gives how many mol of CO2CO_2 and H2OH_2O in CH4+2O2→CO2+2H2OCH_4 + 2O_2 \rightarrow CO_2 + 2H_2O?

Example 9

hard
Percent yield: CaCO3→CaO+CO2\text{CaCO}_3 \to \text{CaO} + \text{CO}_2. Decomposing 100.0100.0 g of CaCO3\text{CaCO}_3 yields 50.050.0 g of CaO\text{CaO} in practice. What is the percent yield? (M(CaCO3)=100.09M(\text{CaCO}_3) = 100.09, M(CaO)=56.08 g/molM(\text{CaO}) = 56.08\,\text{g/mol})

Example 10

challenge
From 2C8H18+25O2→16CO2+18H2O2C_8H_{18} + 25O_2 \rightarrow 16CO_2 + 18H_2O, how many mol CO2CO_2 form from 4 mol octane, and why is CO2CO_2 a product?

Example 11

medium
In CaCO3→CaO+CO2\text{CaCO}_3 \to \text{CaO} + \text{CO}_2, what mass of CO2\text{CO}_2 is produced from 50.050.0 g of CaCO3\text{CaCO}_3? (M(CaCO3)=100.09M(\text{CaCO}_3) = 100.09, M(CO2)=44.01 g/molM(\text{CO}_2) = 44.01\,\text{g/mol})

Example 12

challenge
Design an experiment to confirm that water is a product of the combustion of methane CH4+2O2→CO2+2H2O\text{CH}_4 + 2\text{O}_2 \to \text{CO}_2 + 2\text{H}_2\text{O}, distinguishing water vapor from CO2\text{CO}_2.

Example 13

medium
In CaCO3→CaO+CO2CaCO_3 \rightarrow CaO + CO_2, identify the products and which one is a gas.

Example 14

easy
In CH4+2O2→CO2+2H2OCH_4 + 2O_2 \rightarrow CO_2 + 2H_2O, list the products.

Example 15

medium
A reaction produces a gas in an open beaker, and the beaker's mass drops. Where did the product go?

Example 16

easy
In Zn+2HCl→ZnCl2+H2\text{Zn} + 2\text{HCl} \to \text{ZnCl}_2 + \text{H}_2, name all products.

Example 17

easy
In 2H2+O2→2H2O2H_2 + O_2 \rightarrow 2H_2O, name the product.

Example 18

medium
In 2H2O2→2H2O+O22H_2O_2 \rightarrow 2H_2O + O_2 with a MnO2MnO_2 catalyst, name the products and explain why MnO2MnO_2 is not one.

Example 19

medium
In the reaction Fe2O3+3CO→2Fe+3CO2\text{Fe}_2\text{O}_3 + 3\text{CO} \rightarrow 2\text{Fe} + 3\text{CO}_2, identify the products and calculate how many moles of each product are formed from 1.51.5 mol of Fe2O3\text{Fe}_2\text{O}_3.

Example 20

medium
In C3H8+5O2→3CO2+4H2O\text{C}_3\text{H}_8 + 5\text{O}_2 \to 3\text{CO}_2 + 4\text{H}_2\text{O}, calculate the moles of each product formed from 2.02.0 mol of C3H8\text{C}_3\text{H}_8.
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