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What is the characteristic of Sulfuric Acid (H2S04)
strong Acid
What is the characteristic of carbonic acid (H2CO3)
Weak Acid
What is the characteristic of HF
Weak Acid
What is the characteristic of Be (OH)2
Weak Base
What is the characteristic of HCN
weak acid
What is the characteristic of amonia (NH4OH
weak base
KCl solution is a buffer solution that is acidic, basic, or neutral.
neutral
NH₄Cl solution is a buffer solution that is acidic, basic, or neutral
acid
NaNO₃ solution is a buffer solution that is acidic, basic, or neutral
neutral
Na₂SO₄ solution is a buffer solution that is acidic, basic, or neutral
neutral
There are the following solutions: (1) 25 mL HCOOH 0.1 M (2) 25 mL NaOH 0.1 M (3) 25 mL Ba(OH)₂ 0.1 M (4) 25 mL NH₃ 0.3 M (5) 25 mL HNO₃ 0.2 M The pairs that can form a buffer solution are . . A. (1) and (2) C. (2) and (5)
A
Some solutions are composed of the following pairs of solutions: 1. HNO₃ and KNO₃ 2. CH₃COOH and CH₃COONa 3. NH₃ and NH₄NO₃ 4. NaOH and NaCl 5. HCl and NaHSO₄ Determine the pairs of solutions that form buffer solutions
2 and 3
Determine which of the following pairs of substances can form an acid buffer solution . . . . a) HNO₃ and KNO₃ b) HCOOH and HCOONa c) NH₃ and NH₄NO₃ d) NaOH and NaBr e) HCl and NH₄OH
B
The mixture of 100 mL of 0.2 M NH4OH solution with 200 mL of 0.1 M NH₄Br solution will have a pH of . . . . (Kb NH4OH = 1.8 × 10⁻⁵)
9 + log 1,8
150 mL of 0.2 M HCOOH solution is mixed with 50 mL of 0.2 M NaOH. If Ka HCOOH = 1.8 × 10⁻⁴, then the pH of the resulting solution is . . .
4 - log 1.8
The mass of HCOONa (Mr = 68.01) that must be dissolved in 250 mL of 0.15 M HCOOH solution to obtain a buffer solution with a pH = 4 is . . . . (Ka HCOOH = 1.8×10⁻⁴)
4.64 gram
