Chapter 8 review part 2

chemical formula

A catalyst for a reaction is indicated by a ____________________ written over the arrow in a chemical equation

precipitate

A solid produced by a chemical reaction that then separates from the solution is called a(n)

salt

An active metal and halogen react to form a

oxide

An element combining with oxygen makes an

double-displacement

The equation AX + BY → AY + BX is the general equation for a(n) _________________________ reaction

decompostion

The equation AX → A + X is the general equation for a(n) ____________________ reaction

atoms

The mass of the products of the reaction C2H5OH + 3O2 → 2CO2 + 3H2O equals the mass of the reactants because the products are made up of the same ____________________ as the reactants.

decomposition

The reaction 2HgO(s) → 2Hg(l) + O2(g) is classified as a(n) ____________________ reaction

synthesis

The reaction 2Mg(s) + O2(g) → 2MgO(s) is classified as a(n) ____________________ reaction

displacement

The reaction Mg(s) + 2HCl(aq) → H2(g) + MgCl2(aq) is classified as a(n) ____________________ reaction

coefficient

The small whole number that appears in front of a formula in a chemical equation is called a(n)

two elements

If a binary compound decomposes what is produced

double-displacement

In a(n) _________________________ reaction, ions of two compounds exchange places in aqueous solution to form new compounds

(aq)

In an equation, the symbol for a substance in water solution is

solid

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

Al3+,NO3-

In the chemical equation 2AlCl3(aq) + 3Pb(NO3)2(aq) → 3PbCl2(s) + 2Al(NO3)2(aq), the spectator ions are ____________________ and ____________________.

six

In the chemical reaction 2Cr(s) + 3O2(g) → 2CrO3(s), two chromium atoms combine with ___________________ oxygen atoms

H2(g)

In writing a formula equation for a reaction that produces hydrogen gas, the correct representation of hydrogen gas is

spectator ions

Ions that are present in solution in which a reaction is taking place but that do not participate in the reaction are called

aqueous solution

Know what the (aq) symbol means

A catalyst for the reaction

What does a chemical formula written over the arrow indicate

S + O2 -> SO2

What is the correct equation for the combustion of sulfur

elements

When balancing a chemical equation, insert coefficients to make the number of atoms of each of the ____________________ in the products equal to that of the reactants

hydrogen

When placed in water, a metal more active than hydrogen will form two substances, a metal hydroxide and ___________________ gas

3

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

9

When the formula equation Fe3O4 + Al → Al2O3 + Fe is correctly balanced, the coefficient of Fe is

2

When the formula equation H2(g) + Cl2(g) → HCl(g) is correctly balanced, the coefficient of HCl is

1

When the formula equation Zn(OH)2 + CH3COOH → Zn(CH3COO)2 + H2O is correctly balanced, the coefficient of Zn(CH3COO)2 is