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