Chemistry Chapter 8 Test

The decomposition of a substance by an electric current is called

Electrolysis

If chlorine gas is produced by halogen replacement, the other halogen in the reaction must be

Fluorine

The activity series of metals indicates the ease with which metal

Loss of electrons

Predict the product of the reaction represented by the following equation: MgO + CO2 -->

MgCO3

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

NaOH

In one type of synthesis reaction, an element combines with oxygen to yield a(n)

Oxide

An element in the activity series can replace any element

below it

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

coefficients

Which reaction can be predicted from the activity series

2H2O(aq) + 2Na(s) -> 2NaOH(aq) + H2(g)

Which reaction does not occur?

2HF(aq) + Cl2(g) -> F2(g) + 2HCl(aq)

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

H2

In a chemical reaction

The total mass of the original reactants always equals the mass of the products

In a double displacement reaction, hydrogen chloride and sodium hydroxide react to produce sodium chloride. Another product is

Water

A chemical formula written over the arrow in a chemical equation signifies

a catalyst for the reaction

The ability of an element to react is the element's

activity

What is the name of a list of elements arranged according to the ease with which they undergo certain chemical reactions?

activity series

According to the law of conservation of mass, the total mass of the reacting substances is

always equal to the total mass of the products

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

change in total mass of substances

In what kind of reaction do the ions of two compounds exchange places in aqueous solution to form two new compounds

double displacement reaction

If a certain metal is placed in an ionic solution containing another metal and no reaction occurs, then the metal originally in the solution is

higher on the activity series

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

precipitate

When a slightly soluble solid compound is produced in a double-displacement reaction, a

precipitate is formed

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

synthesis reaction