First Semester Study Guide - AP Chem – Buck Exam Questions and Answers | 100% Pass
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Course
AP Chem
Institution
AP Chem
First Semester Study Guide - AP
Chem – Buck Exam Questions and
Answers | 100% Pass
Salts containing which of the following ions are generally insoluble in cold water?
a. nitrate
b. acetate
c. phosphate
d. potassium
e. ammonium - ️️ Correct-C. Phosphate
Which of the following changes ...
First Semester Study Guide - AP
Chem – Buck Exam Questions and
Answers | 100% Pass
Salts containing which of the following ions are generally insoluble in cold water?
a. nitrate
b. acetate
c. phosphate
d. potassium
e. ammonium - ✔️✔️Correct-C. Phosphate
Which of the following changes alone would cause a decrease in the value of Keq for
the reaction represented above?
a. Decreasing the volume of the
reaction vessel
b. Adding a catalyst
c. Increasing the volume of the
reaction vessel
d. Increasing the temperature
e. Decreasing the temperature - ✔️✔️Correct-D. Increasing the temperature
If 200. mL of 0.60 M MgCl2(aq) is added to 400. mL of distilled water, what is the
concentration of Mg2+(aq) in the resulting solution? (Assume volumes are additive.)
A precipitation reaction - ✔️✔️Correct-e. Ca^2+(aq) + SO2^2-(aq) ---> CaSO4(s)
A buffer at pH>8
a. HCl and NaCl
b. H3PO4 and NaH2PO4
c. NH3 and HC2H3O2 (acetic acid)
d. NaOH and NH3
e. NH3 and NH4Cl - ✔️✔️Correct-e. NH3 and NH4Cl
At a certain temperature, the value of the equilibrium constant, K, for the reaction
represented above is 2.0 X 105. What is the value of K for the reverse reaction at the
same temperature?
a. 5.0 X 10^-4
b. 2.0 X 10^-5
c. -2.0 X 10^-5
d. 5.0 X 10^-5
e. 5.0 X 10^-6 - ✔️✔️Correct-E. 5.0 X 10^-6
In a saturated solution of Zn(OH)2 at 25oC, the value of [OH-] is 2.0 X 10-6 M. What is
the value of the solubility-product constant, Ksp, for Zn(OH)2 at 25oC?
a. 2.0 X 10^-6
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