Chemistry Chapter 8

An element in the activity series can replace any element

Below it on the list

Predict what happens when calcium metal is added to a solution of magnesium chloride.

Calcium chloride forms

Which observation does not indicate that a chemical reaction has occurred?

Change in total mass of substance

In an equation, they symbol for a substance in water solution is followed by

(aq)

Which coefficients correctly balance the formula equation NH4NO2(s) -> N2(g) + H2O(l)?

1,1,2

What is the balanced equation when aluminum reacts with copper(II) sulfate?

2Al + 3CuSO4 -> Al2(SO4)3 + 3Cu

Which equation is not balanced?

2H2 + O2 -> H2O

When the equation Fe3O4 + Al -> Al2O3 + Fe is correctly balanced, what is the coefficient of Fe?

9

What is the small whole number that appears in front of a formula in a chemical reaction?

A coefficient

When a solid produced by a chemical reaction separates from the solution it is called

A precipitate

In the equation 2Al(s) + 3Fe(NO3)2(aq) -> 3Fe(s) + 2Al(No3)3(aq), iron has been replaced by

Aluminum

How would oxygen be represented in the formula equation for the reaction of methane and oxygen to yield carbon dioxide and water?

O2

In a chemical reaction

The mass of the reactants equals the mass of the products

When the formula equation CuSO4(aq) + Fe(s) -> Fe2(SO4)3(aq) + Cu(s) is correctly balanced, the coefficient of CuSO4(aq) is

Three

Predict what happens when nickel is added to a solution of potassium chloride.

No reaction occurs

In the chemical equation 2AlCl3(aq) + 3Pb(NO3)2(aq) -> 3PbCl2(s) + 2Al(NO3)3(aq), the state of PbCl2 is a(n)

Solid

In what kind of reaction do two or more substances combine to form a new compound?

Synthesis reaction

The equation A + X -> AX is the general equation for a(n)

Synthesis reaction

The reaction represented by the equation 2Mg(s) + O2(g) -> 2MgO(s) is a

Synthesis reaction

To balance a chemical equation, it may be necessary to adjust the

Coefficients

The reaction represented by the equation 2hgO(s) -> 2Hg(l) + O2(g) is classified as a(n) _____________ reaction

Decomposition

In what kind of reaction does a single compound produce two or more simpler substances?

Decomposition reaction

The equation AX -> A + X is the general equation for a

Decomposition reaction

The reaction represented by the equation 2HgO(s) -> 2Hg(l) + O2(g) is a(n)

Decomposition reaction

The reaction represented by the equation 2KClO3(s) -> 2KCl(s) + 3O2(g) is a(n)

Decomposition reaction

The reaction AX + BY -> AY + BX is the general equation for

Double-displacement reaction

The reaction represented by the equation Pb(NO3)2(aq) + 2KI(aq) -> PbI2(s) + 2KNO3(aq) is a

Double-displacement reaction

In the word equation, sodium hydroxide + water -> sodium hydroxide, the formula for sodium hydroxide is replaced by

NaOH

In writing a chemical equation that produces hydrogen gas, the correct representation of hydrogen gas is

H2

Magnesium bromide (aq) + chlorine (g) yields

MgCl2(aq) and Br2(l)

When a metal chlorate is heated, it decomposes to yield a metal chloride and

Oxygen

What is the balanced equation for the combustion of sulfur?

S(s) + O2(g) -> SO2(g)

The reaction represented by the equation Mg(s) + 2HCl(aq) -> H2(g) + MgCl2(aq) is classified as a(n) ___________________ reaction

Single-displacement

The equation A + BX -> AX + B is the general equation for a

Single-displacement reaction

The reaction represented by the equation Mg(s) + 2HCl(aq) -> H2(g) + MgCl2(aq) is a

Single-displacement reaction

When sodium chlorate, NaClO3, decomposes, the products are

Sodium chloride and oxygen

When a binary compound decomposes, what is produced?

Two elements

Magnesium hydroxide decomposes to yield magnesium and

Water

Many calcium hydroxides decompose when heated to yield calcium oxides and

Water