Full SAT Chemistry Practice Test 3: Part C

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Question 23 questions

Time 16 minutes

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1. Which of the following compounds would be expected to have the greatest lattice binding energy?

A. LiNO3
B. LiF
C. KI
D. NH4Br
E. CsNO3

2. The daughter nucleus formed when 18F undergoes positron emission is

A. 14N
B. 16O
C. 18O
D. 19F
E. 20Ne

3. Which of the following reactions produces a yellow precipitate?

A. NaOH(aq) + HCl(aq) → NaCl(s) + H2O
B. NaOH(aq) + BaCl(aq) → BaOH(s) + NaCl(aq)
C. Pb(NO3)2(aq) + 2KI(aq) → 2KNO3(aq) + PbI2(s)
D. CuO(s) + Mg(s) → Cu(s) + MgO(s)
E. 4Fe + 3O2 → 2Fe2O3

4. Zn(s)|ZnCl2(aq)|Cl(aq)|Cl2(g)|C(s)

In the electrochemical cell described by the cell diagram above, what reaction occurs at the anode?

A. Zn → Zn2+ + 2e
B. Zn2+ + 2e → Zn
C. Cl2 + 2e → 2Cl-
D. 2Cl- → Cl2 + 2e
E. Zn + Cl2 → ZnCl2

5. Given the reaction A → B + C, where ΔHrxn is negative, what effect would increasing the temperature (at constant pressure) have on the system at equilibrium?

A. No change
B. Cannot be determined
C. Shift to the right
D. Shift to the left for K < 1 and to the right for K >1
E. Shift to the left

6. An unknown acid solution was presumed to be either HCl or H2SO4. Which one of the following salt solutions would produce a precipitate when added to H2SO4 but not when added to HCl?

A. LiNO3
B. NH4NO3
C. CsNO3
D. Ba(NO3)2
E. AgNO3

7. Ca3(PO4)2(s) 3 Ca2+(aq) + 2 PO43?(aq)

What is the equilibrium expression for the dissolution of Ca3(PO4)2 where the above is true?

A. Ksp = [Ca2+]3[PO43-]2
B. Ksp = [Ca2+]2[PO43-]3
C. Ksp = [Ca2+][PO43-]/[Ca3(PO4)2]
D. Ksp = [Ca2+]3[PO43-]2/[Ca3(PO4)2]
E. Ksp = [Ca2+]2[PO43-]3/[Ca3(PO4)2]

8. Which of the following represents a conjugate acid/base pair?

A. Na+/Cl-
B. HCl/H+
C. H2CO3/CO32-
D. NH3/NH4+
E. K+/OH-

9. An unknown solution having a pH of 3.5 was titrated with 0.1 M NaOH. Analysis of the resulting titration curve showed a single equivalence point at pH 7. Therefore, which of the following could be the unknown solute in the initial solution?

A. HF
B. HCl
C. LiOH
D. NH3
E. H2SO4

10. Acid/base titration experiments could be used to determine all of the following directly EXCEPT

A. the acid concentration of an acidic solution
B. the alkalinity of a basic solution
C. the pKa of an unknown weak acid
D. whether an unknown acid is monoprotic or polyprotic
E. the molecular weight of an unknown acid or base

11. What is the correct term for the phase change from gas directly to solid?

A. Deposition
B. Sublimation
C. Liquefaction
D. Fusion
E. Vaporization

12. What is the correct name for a straight-chained organic compound with the molecular formula C3H8?

A. Methane
B. Ethane
C. Methylethane
D. Propane
E. Isopropane

13. If the pH of a solution is changed from 1 to 3 with the addition of an antacid, what percentage of [H+] was neutralized?

A. 2%
B. 10%
C. 20%
D. 90%
E. 99%

14. Which of the following statements is the most accurate with regard to the significance of Avogadro's number, 6.02 × 1023?

A. It is the conversion factor between grams and atomic mass units.
B. It is a universal physical constant just as the speed of light.
C. It is the number of particles that is required to fill a 1-liter container.
D. It is the inverse diameter of an H atom.
E. It is the number of electrons in the universe.

15. Unknown metal #1 could be

A. mercury
B. copper
C. zinc
D. iron
E. silver

16. Unknown metal #2 could be

A. carbon
B. copper
C. zinc
D. sodium
E. silver

17. The addition of dilute HCl to unknown metal #1 produced a transparent gas. What is the likely identity of this gas?

A. Cl2
B. H2
C. O2
D. CO2
E. NO2

18. The addition of dilute HNO3 to unknown metal #2 produced an orange gas. What is the likely identity of this gas?

A. Cl2
B. H2
C. O2
D. CO2
E. NO2

19. Which of the following solutions is the product of the neutralization reaction between 10 ml 0.2 M KOH and 10 ml 0.2 M HI?

A. 0.1 M KI3
B. 0.1 M KI
C. 0.2 M KI
D. 0.4 M KI
E. 0.4 M HOH

20. Which of the following is true regarding an Ne atom with a mass number of 20 and an O2– ion with a mass number of 16?

A. They contain the same number of protons.
B. They contain the same number of neutrons.
C. They contain the same number of protons plus neutrons.
D. They are isoelectronic.
E. They are isomers.

21. Which of the following statements is NOT correct regarding chemical catalysts?

A. They are not consumed during the chemical reaction.
B. They cannot make nonspontaneous reactions occur.
C. They do not have to be the same phase as the reactant molecules.
D. They shift equilibrated reactions to the product's side.
E. Enzymes are biological catalysts.

22. Most elements are solids at 25°C and 1 atm pressure, the exception being the 11 elements that are gases and 2 that are liquids. What 2 elements are liquids?

A. Hg and Br
B. Hg and I
C. Ag and Kr
D. Au and Kr
E. Pt and Co

23. A student conducted an experiment and obtained three values during three repetitive trials: 1.65, 1.68, 1.71. Later, the student discovered that the true value was 2.37. In contrast to the real value, the experimental results should be characterized as

A. not accurate and not precise
B. accurate but not precise
C. not accurate but precise
D. accurate and precise
E. accurate, precise, but unreliable