CHEM 10 chapter 7 Chemical Reactions and Chemical Equations

Flashcards covering key concepts in chemical reactions and equations.

Evidence of a chemical reaction includes whether atoms combine to form __.

compounds

When electric current passes through water, it results in the formation of gas and gas.

hydrogen; oxygen

In a chemical reaction, which of the following is NOT a chemical change: Ice melting, Electric current passing through water, Iron rusting, or Bubbles forming when a soda can is opened?

Ice melting

The combustion of butane in a lighter is an example of a __ reaction.

chemical

When sodium bicarbonate is combined with hydrochloric acid, __ form.

bubbles

Copper turning green on exposure to air is a __ reaction.

chemical

The balanced chemical equation for the reaction of solid silicon dioxide with solid carbon to produce solid silicon monocarbide and carbon monoxide gas is __.

SiO2(s) + 3 C(s) → SiC(s) + 2 CO(g)

In a balanced equation, the number of __ atoms must be the same on both sides of the equation.

each element's

An aqueous solution is a __ mixture of a substance with water.

homogeneous

A compound containing __ is generally soluble in water.

Li+, Na+, K+, NH4+, NO3, or C2H3O2

When silver chloride is added to water and does not dissolve, it is considered __.

insoluble

The net ionic equation for the precipitation reaction between Pb2+ and I- is __.

Pb2+(aq) + 2 I-(aq) → PbI2(s)