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What is the change in pH when 10.0 mL of 0.250 M KOH (aq) is added...

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Question

Chemistry

What is the change in pH when 10.0 mL of 0.250 M KOH(aq) is added to 100.0 mL of a buffer that is 0.150 M inHCOOH (aq) and 0.100 M in HCOO– (aq)?pKa = 3.75 for HCOOH (aq).

Select one:

a. –0.26 pH unit

b. +0.18 pH unit

c. +0.00 pH unit

d. –0.81 pH unit

QUESTION 2

What is the molarity of an aqueous barium hydroxide solution ifit takes 59.9 mL of 0.100 M HCl (aq) to neutralize 21.6 mLof the Ba(OH)2 (aq) solution?

Select one:

a. 0.208 M

b. 0.277 M

c. 0.139 M

d. 0.0693 M

Answer & Explanation Solved by verified expert
4.4 Ratings (997 Votes)
What is the change in pH when 100 mL of 0250 M KOH aq is added to 1000 mL of a buffer that is 0150 M in HCOOH aq and 0100 M in HCOO aq pKa 375 for HCOOH aq Solution Lets first calculate the moles of each Moles of KOH 0250 mol per L 0010 L 00025 mol Moles of HCOOH 0150 mol per    See Answer
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