Test 2 Practice
#1
Supplemental Instruction
IowaStateUniversity / Leader: / Sara
Course: / Chem177
Instructor: / Kingston
Date: / October 5, 2014

1)Which of the following is not a strong acid?

  1. HBr
  2. HI
  3. HClO4
  4. HF

2)When 250ml of 2.0M HCl is diluted to 1.00L, what is the concentration of the resulting solution?

  1. 1.0M
  2. 0.50M
  3. 4.0M
  4. 2.0M

3)Using the dilution from problem 2 how many moles of HCl are in the final solution?

  1. 2.0 mol
  2. 0.50mol
  3. 4.0mol
  4. 1.0mols

4)Which of the following would make the light very bright in the conductivity experiment done in lecture?

(i) HNO3(ii) NH4NO3(iii) HC2H3O2(iv) KOH

  1. i,ii
  2. i, ii, iii
  3. i, iii, iv
  4. i, ii, iv

5)What is the oxidation state of the sulfur atom in the SO42- ion?

  1. -2
  2. +3
  3. +6
  4. +8

6)Complete and balance the following reactions, also name the type of reactions they are

  1. 2HCl(aq) +Ca(OH)2 (aq) 2H2O(l)+CaCl2(aq)
  2. Whattype(s) of reactionis in part(a)?

Neutralization and double displacment

  1. Write the net ionic equation of the rxn from part (a)

H+ (aq) + OH- (aq)  H2O (l)

  1. Iron(II) solid reacts with aqueous Nickel(II)Nitrate

Fe (s) + Ni(NO3)2 (aq)  Ni (s) + Fe(NO3)2 (aq)

  1. What type(s) of reaction is in aprt (b)

Single displacement and REDOX

  1. Circle the oxidized atom and underline the reduced atom in the balanced equation you gave above in (d)Iron Oxidized Ni reduced

7)Use the following reaction to answer the following:

3Fe (s) + 4CO2 (g) Fe3O4 (s) + 4 CO (g) ΔH = + 23.5 kJ

  1. The reaction is
  2. Exothermic
  3. Endothermic
  4. Isoentropic
  5. Isothermal
  6. Not enough information
  7. To produce Fe3O4 do you need to add heat to the system or is heat given off?

Need to add heat

8)Write the Molecular, Complete Ionic, and Net Ionic equations for the reaction between aqueous Silver (I) Nitrate and Barium Bromide.

2AgNO3(aq)+BaBr2(aq)Ba(NO3)2(aq)+2AgBr(s)

2Ag+(Aq) + 2NO3-(aq)+Ba2+(aq) + 2Br-(aq) Ba2+(aq) + 2NO3-(aq)+2AgBr(s)

2Ag+(Aq) + 2Br-(aq) 2AgBr(s)

  1. What are the spectator ions?

Barium and Nitrate

  1. If you have 100.0 mL of both solutions, and both solutions are .83 Molar, which is the limiting Reagent?
  1. What is the concentration of the Barium Ion left?

0.0415 moles left over  .415 Molar

9)If you dissolve 7.00 g of chloric acid (mm=84.5 g/mol) in water and titrate it with 17mL of Ca(OH)2. What is the Molarity of the Calcium Hydroxide?

10)In Which molecule does Chromium have the lowest oxidation number?

  1. Cr2O33+
  2. Na2Cr2O7+6
  3. CrSO42+
  4. Cr(III) ion3+