Practice Product in Chemistry

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

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→2AlCl3, how many moles of product form from 1.5 mol Cl2 (excess Al)?

Example 2

medium
Predict the products of the neutralization H2SO4+2KOH→ ?

Example 3

easy
In the synthesis reaction 2Mg+O2→2MgO, name the product.

Example 4

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

Example 5

medium
In Mg(s)+CuSO4(aq)→MgSO4(aq)+Cu(s), identify the solid product and explain why it is solid.

Example 6

medium
In 2KClO3→2KCl+3O2, how many moles of O2 are produced from 0.40 mol KClO3?

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 CH4 gives how many mol of CO2 and H2O in CH4+2O2→CO2+2H2O?

Example 9

hard
Percent yield: CaCO3→CaO+CO2. Decomposing 100.0 g of CaCO3 yields 50.0 g of CaO in practice. What is the percent yield? (M(CaCO3)=100.09, M(CaO)=56.08 g/mol)

Example 10

challenge
From 2C8H18+25O2→16CO2+18H2O, how many mol CO2 form from 4 mol octane, and why is CO2 a product?

Example 11

medium
In CaCO3→CaO+CO2, what mass of CO2 is produced from 50.0 g of CaCO3? (M(CaCO3)=100.09, M(CO2)=44.01 g/mol)

Example 12

challenge
Design an experiment to confirm that water is a product of the combustion of methane CH4+2O2→CO2+2H2O, distinguishing water vapor from CO2.

Example 13

medium
In CaCO3→CaO+CO2, identify the products and which one is a gas.

Example 14

easy
In CH4+2O2→CO2+2H2O, 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, name all products.

Example 17

easy
In 2H2+O2→2H2O, name the product.

Example 18

medium
In 2H2O2→2H2O+O2 with a MnO2 catalyst, name the products and explain why MnO2 is not one.

Example 19

medium
In the reaction Fe2O3+3CO→2Fe+3CO2, identify the products and calculate how many moles of each product are formed from 1.5 mol of Fe2O3.

Example 20

medium
In C3H8+5O2→3CO2+4H2O, calculate the moles of each product formed from 2.0 mol of C3H8.