Question : 51) A 25.0 mL sample of H3PO4 requires 50.0 mL : 1362965

 

51) A 25.0 mL sample of H3PO4 requires 50.0 mL of 1.50 M NaOH for complete neutralization.  What is the molarity of the acid?

H3PO4   +  3NaOH  → Na3PO4  +  3 H2O

 

A) 0.333 M

B) 3.00 M

C) 1.50 M

D) 1.00 M

E) 0.750 M

52) A 25.0 mL sample of H2SO4 requires 20.0 mL of 2.00 M KOH for complete neutralization.  What is the molarity of the acid?

H2SO4  +  2KOH  →  K2SO4  +  2 H2O

 

A) 2.00 M

B) 2.50 M

C) 0.800 M

D) 1.60 M

E) 1.25 M

53) A 10.0 mL of 0.121 M H2SO4 is neutralized by 17.1 mL of KOH solution.  The molarity of the KOH solution is 

A) 0.207 M

B) 0.4141 M

C) 0.0708 M

D) 0.428 M

E) 0.142 M

54) How many milliliters of 0.400 M NaOH are required to completely neutralize 20.0 mL of 0.200 M HCl?

A) 50.0 mL

B) 40.0 mL

C) 0.100 mL

D) 20.0 mL

E) 10.0 mL

55) How many milliliters of 0.200 M NaOH are required to completely neutralize 5.00 mL of 0.100 M H3PO4? 

A) 7.50 mL

B) 2.50 mL

C) 0.833 mL

D) 5.00 mL

E) 15.0 mL

56) How many milliliters of 0.100 M Ba(OH)2 are required to neutralize 20.0 mL of 0.250 M HCl?

A) 100. mL

B) 50.0 mL

C) 25.0 mL

D) 0.250 mL

E) 0.50 mL

57) The Ka for hydrofluoric acid is 7.2 x 10-4.  This means that HF is 

A) neutral in water solution.

B) able to react with HCl.

C) a weak acid.

D) a strong acid.

E) ionic.

58) In a sulfuric acid solution, where the [H2SO4] is 0.005 M, what is the pH?

A) pH = 12.0

B) pH = 2.0

C) pH = 3.0

D) pH = 11.0

E) pH = 5.0

59) When a piece of magnesium metal is added to hydrochloric acid, what gas is produced?

A) oxygen

B) chlorine

C) nitrogen

D) carbon dioxide

E) hydrogen

60) The salt made from a weak acid and a strong base should give a solution of

A) high concentration.

B) low concentration.

C) pH > 7.

D) pH < 7 E) pH = 7. 61) Which solution has the highest pH? A) a buffer made with 0.10 M acetic acid and 0.01 M sodium acetate B) a buffer made with 0.10 M acetic acid and 0.10 M sodium acetate C) a buffer made with 0.01 M acetic acid and 0.10 M sodium acetate D) a buffer made with 0.01 M acetic acid and 0.01 M sodium acetate E) All of the buffers have the same pH since they are all made with acetic acid and sodium acetate. 62) Which solution has the lowest pH? A) a buffer made with 0.10 M acetic acid and 0.01 M sodium acetate B) a buffer made with 0.10 M acetic acid and 0.10 M sodium acetate C) a buffer made with 0.01 M acetic acid and 0.10 M sodium acetate D) a buffer made with 0.01 M acetic acid and 0.01 M sodium acetate E) All of the buffers have the same pH since they are all made with acetic acid and sodium acetate. 63) Acid rain has a  A) pH < 7. B) pH > 7.

C) pH < 6.2. D) pH < 2.6. 64) A major cause of acid rain is A) CO2 production. B) CaCO3 production. C) SO2 production. D) NH3 production. For the problem(s) that follow, consider the reaction in which magnesium reacts with an HCl solution . Mg(s)  +  2HCl(aq)   →  MgCl2 (aq)  +  H2 (g)   65) If 2.00 g of Mg reacts completely with 50.0 mL of HCl solution, what is the molarity of the HCl solution? A) 1.65 M B) 80.0 M C) 8.00 M D) 0.823 M E) 3.29 M    

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