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General Chemistry I - Old Exam 3 with Answer Key | CHEM 1110, Exams of Chemistry

Material Type: Exam; Professor: Condon; Class: General Chemistry I; Subject: Chemistry; University: Roane State Community College; Term: Fall 2001;

Typology: Exams

Pre 2010

Uploaded on 08/18/2009

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CHEM 1110 - test 3 for Dr. Condon’s sections - Fall 2001 page 1
CHEM 1110 test 3 for Dr. Condon’s section during Fall 2001
1. How many grams of NaCl are required to make 350 mL of a 0.500 M saline solution?
a. 976 g b. 10.2 g c. 0.0976 g d. 1.0 × 104 g e. 29.5 g
2. Starting with a 10.0 M solution of NaOH, how many milliliters of this solution are required to
make up 5.0 L of a 0.150 M solution of NaOH?
a. 1.33 × 10!2 mL b. 30 mL c. 3.33 mL d. 75 mL e. 300 mL
3. In a titration, the following reaction was used to determine the concentration of Ca(OH)2 in a
water solution:
Ca(OH)2 + 2HCl ! CaCl2 + 2H2O
200.0 mL of the Ca(OH)2 solution was used in the titration. To reach an endpoint, 15.05 mL
of a 0.1025 M solution of HCl was required. What was the concentration of the Ca(OH)2?
a. 0.001542 Mb. 1.928 Mc. 7.713 Md. 3.857 × 10-3 Me. 7.713 × 10!3 M
4. What is the IUPAC name for the compound Fe3(PO3)2?
a. iron II phosphite
b. ferric phosphate
c. ferric hyperphosphite
d. iron III phosphite
e. iron III phosphate
5. What is the IUPAC name for the compound SO3?
a. sulfate
b. sulfur trioxide
c. sulfite
d. monsulfur trioxide
e. sulfuric oxide
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CHEM 1110 test 3 for Dr. Condon’s section during Fall 2001

  1. How many grams of NaCl are required to make 350 mL of a 0.500 M saline solution? a. 976 g b. 10.2 g c. 0.0976 g d. 1.0 × 10^4 g e. 29.5 g
  2. Starting with a 10.0 M solution of NaOH, how many milliliters of this solution are required to make up 5.0 L of a 0.150 M solution of NaOH? a. 1.33 × 10!^2 mL b. 30 mL c. 3.33 mL d. 75 mL e. 300 mL
  3. In a titration, the following reaction was used to determine the concentration of Ca(OH) 2 in a water solution:

Ca(OH) 2 + 2HCl! CaCl 2 + 2H 2 O

200.0 mL of the Ca(OH) 2 solution was used in the titration. To reach an endpoint, 15.05 mL of a 0.1025 M solution of HCl was required. What was the concentration of the Ca(OH) 2? a. 0.001542 M b. 1.928 M c. 7.713 M d. 3.857 × 10-3^ M e. 7.713 × 10!^3 M

  1. What is the IUPAC name for the compound Fe 3 (PO 3 ) 2? a. iron II phosphite b. ferric phosphate c. ferric hyperphosphite d. iron III phosphite e. iron III phosphate
  2. What is the IUPAC name for the compound SO 3? a. sulfate b. sulfur trioxide c. sulfite d. monsulfur trioxide e. sulfuric oxide
  1. 25.0 g of CaCO 3 was recovered from the following reaction when 16.0 g each of CaO and CO 2. What was the percent yield for this process?

CaO + CO 2! CaCO 3

a. 100 % b. 114 % c. 78 % d. 69 % e. 88 %

  1. Which of the following is a strong acid? a. HBrO 3 b. KOH c. HF d. H 3 PO 4 e. H 2 SO 3
  2. Which of the following is a strong soluble base? a. NaOH b. H 3 PO 4 c. CH 3 NH 2 d. HClO 4 e. HF
  3. Which of the following is a weak soluble base? a. H 3 PO 4 b.^ CH 3 NH 2 c.^ Fe(OH) 3 d.^ NaOH^ e.^ HClO 4
  4. Which of the following is a weak acid? a. HClO 4 b. Fe(OH) 3 c. HF d. NaOH e. CH 3 NH 2
  5. Which of the following is a slightly soluble base (insoluble hydroxide)? a. NaOH b. Mg(OH) 2 c. NH 3 d. HF e. HClO 2
  6. What is(are) the product(s) for the reaction:

PCl 5 + H 2 O !?

a. b. HH 3 PO 3 + Cl 2 c. H^3 PO^4 + ClO d. H^3 PO^4 + HCl e. HPO^3 PO^3 + HCl 3 + HCl

  1. Which of the following represents a Brønsted-Lowry acid-base reaction?

a. NH 3 + H 2 O! NH 4 +^ + OH!

b. Ag+^ + Cl!^! AgCl

c. Ag+^ + 2NH 3! Ag(NH 3 ) 2 +

d. HCl + NaOH! NaCl + H 2 O

e. AgCl + 2NH 3! Ag(NH 3 ) 2 Cl (aq)

  1. Which of the following is an example of an overall reaction?

a. Fe3+^ + 3OH!^! Fe(OH) 3

b. HF + H 2 O! F!^ + H 3 O+

c. HCl + NaOH! NaCl + H 2 O

d. Cu2+^ + 4NH 3!^ Cu(NH 3 ) 4 2+

e. NH 3 + H 2 O^!^ NH 4 +^ + OH!

  1. Which of the following of ions is(are) spectator ion(s) in the following reaction:

FeCl 3 (aq) + 3 NaOH (aq)! Fe(OH) 3 (s) + 3NaCl (aq)

a. Na+ b. Na+^ and Cl! c. Fe3+^ and OH! d. Na+^ and OH! e. OH!

  1. Which of the following reactions is an example of a net ionic reaction?

a. CaCl 3 (aq) + H 2 CO 3! CaCO 3 (s) + 3HCl (g)

b. AgCl + 2NH 3! Ag(NH 3 ) 2 Cl (aq)

c. HCl + NaOH! NaCl + H 2 O

d. Ag+^ + Cl!^! AgCl (s)

e. Cu(NO 3 ) 2 (aq) + Zn(s)! Zn(NO 3 ) 2 + Cu(s)

KEY

1.b 2.d 3.d 4.a 5.b 6.e 7.a 8.a 9.b 10.c 11.b 12.c 13.a 14.d 15.c 16.e 17.a 18.c 19.b 20.d