WorksheetsCHEM 1305 Exam 3 Quizizz
Total questions: 20
Worksheet time: 20mins
A solute whose solution is a nonconductor is called...
Nonelectrolyte
Strong Electrolyte
Weak Electrolyte
Crystalline Solute
Which of the following gives the correct formulas and ratio of ions present when sodium carbonate is dissolved in water?
S2–(aq) + CO2+(aq)
2 Na+(aq) + CO32–(aq)
2 Na+(aq) + C4+(aq) + 3 O2–(aq)
What happens when a strong acid is placed in water?
The solution cools as the hydronium ions form
Hydrogen gas is released by the reaction of the acid with the water
The acid dissociates completely into ions
The acid remains in its molecular form
Write the net ionic equation for the reaction that occurs, if any, when cesium metal (Z = 55) is placed in hydrochloric acid. Cesium metal is above hydrogen gas in the activity series.
Cs(s) + H+(aq) --> H(g) + Cs+(aq)
2 Cs(s) + 2 H+(aq) + 2 Cl–(aq) --> H2(g) + 2 Cs+(aq) + 2 Cl–(aq)
There is no reaction
2 Cs(s) + 2 H+(aq) --> H2(g) + 2 Cs+(aq)
Propane, C3H8, is burned as a fuel in heating homes. Write the balanced chemical equation for this reaction. What is the coefficient for CO2?
1
2
3
4
. In the net ionic equation for the following, what are the spectator ions? NH4NO3(aq) + KCl(aq) --> KNO3(aq) + NH4Cl(aq)
All are spectators
None are spectators
potassium ions
chloride
A solution is a homogeneous mixture
True
False
Calculate the grams of alcohol, C2H5OH, in 4.40E2 grams of a 23.0% solution.
13.6g
56g
101g
339g
How many grams of Ba(OH)2 are needed to prepare 2.50 liters of 0.200 M barium hydroxide solution?
77.2g
43.4g
66.8g
85.7g
Nitric acid is commercially available at a concentration of 15.9 M. What volume of this solution must be diluted to a final volume of 1.00 L to prepare a 4.00 M solution?
39.8mL
252mL
456mL
22.2mL
Oxidation is defined as...
the loss of protons
the gain of protons
a loss of electrons
a decrease in oxidation number
How is reduction defined?
A decrease in oxidation number
The loss of electrons
The transfer of a proton
The loss of mass in a chemical reaction
Which of the following processes is a reduction reaction?
2 Br– becoming Br2
Ni2+ becoming Ni3+
Hg22+ becoming 2 Hg
Tin(II) becoming tin(IV)
What is the oxidation number of titanium in TiO2?
+4
+2
+3
-2
Substances that can act both as an acid and as a base are called:
amphoteric
neutral
bases
none of these
The concentration of the hydronium ions in an acidic solution are greater than
1.0 E-7M
True
False
An basic solution has :
[H3O+] > [OH-]
True
False
In a solution that has a pH = 7.0:
[H3O+] > [OH-]
[H3O+] < [OH-]
[H3O+] = [OH-]
The Bronsted-Lowry definition of an acid is:
amphoteric
proton acceptor
proton donor
hydroxide
The Arrhenius definition of an acid is:
produces H+ in solution
proton donor
proton acceptor
produces OH- in solution
