Balancing Equations Test

Front

What is a balanced chemical equation?

Back

A balanced chemical equation has equal numbers of each type of atom on both sides of the equation, following the law of conservation of mass.

Front

What does the coefficient in a chemical equation represent?

Back

The coefficient indicates the number of molecules or moles of a substance involved in the reaction.

Front

What is the purpose of balancing chemical equations?

Back

Balancing chemical equations ensures that the same amount of each element is present on both sides, reflecting the conservation of mass.

Front

What is the law of conservation of mass?

Back

The law of conservation of mass states that mass cannot be created or destroyed in a chemical reaction.

Front

How do you determine the coefficients needed to balance a chemical equation?

Back

Start by counting the number of atoms of each element on both sides, then adjust coefficients to equalize them.

Front

What is the balanced equation for the reaction of ammonium phosphate and lead(IV) nitrate?

Back

@@4(NH_4)_3PO_4 + 3Pb(NO_3)_4 ightarrow 1Pb_3(PO_4)_4 + 12NH_4NO_3@@.

Front

What is the balanced equation for the reaction of silver iodide and sodium sulfide?

Back

@@2AgI + 1Na_2S ightarrow 1Ag_2S + 2NaI@@.

Front

What is the balanced equation for the reaction of calcium and water?

Back

@@1Ca + 2H_2O ightarrow 1Ca(OH)_2 + 1H_2@@.

Front

What is the balanced equation for the reaction of aluminum sulfate and calcium hydroxide?

Back

@@1Al_2(SO_4)_3 + 3Ca(OH)_2 ightarrow 2Al(OH)_3 + 3CaSO_4@@.

Front

What is the balanced equation for the reaction of calcium hydroxide and phosphoric acid?

Back

@@3Ca(OH)_2 + 2H_3PO_4 ightarrow 1Ca_3(PO_4)_2 + 6H_2O@@.