Chapter 12: Q10P (page 283)

Calculate [HY^3-] in a solution prepared by mixing 10.00 mL of 0.010 0 M VOSO₄, 9.90 mL of 0.010 0 M EDTA, and 10.0 mL of buffer with a pH of 4.00

Short Answer

Expert verified

The concentration of HY^3- in solution is 4.6×10^-11M

Step by step solution

Given Information

Volume of VOSO₄ taken to prepare solution = 10 mL

Concentration of VOSO₄ taken to prepare solution = 0.01M

Volume of EDTA taken to prepare solution = 9.90 mL

Concentration of EDTA taken to prepare solution = 0.01M

Volume of buffer (pH=4) solution taken=10 mL

Determine concentration of VO2+ and VOY2-

$\begin{matrix} [V O^{2 +}] = (\frac{0.1}{29.9}) (0.01 M) \\ = 3.34 \times 10^{- 5} M \\ [V O Y^{2 -}] = (\frac{9.9}{29.9}) (0.01 M) \\ = 3.31 \times 10^{- 3} M \end{matrix}$

Equations and data obtained in order to proceed for calculation are as follows

$\begin{matrix} K_{f} = 10^{18.7} \\ A t p H 4 p K_{6} = 10.37 (f o r H_{6} Y^{2 +}) \end{matrix}$

Determine concentration of HY3-

$\begin{matrix} K_{f} = \frac{[V O Y^{2 -}]}{[V O^{2 +}] [Y^{4 -}]} \\ [Y^{4 -}] = \frac{[V O Y^{2 -}]}{[V O^{2 +}] K_{f}} \\ = \frac{[3.31 \times 10^{- 3}]}{[3.34 \times 10^{- 5}] \times 10^{18.7}} \\ = 1.98 \times 10^{- 17} \end{matrix}$

$\begin{matrix} K_{6} = \frac{[H^{+}] [Y^{4 -}]}{[H Y^{3 -}]} \\ [H Y^{3 -}] = \frac{[10^{- 4}] [1.98 \times 10^{- 17}]}{[10^{- 10.37}]} \\ = \frac{[H^{+}] [Y^{4 -}]}{K_{6}} \\ = 4.6 \times 10^{- 11} M \end{matrix}$

Therefore,the concentration of HY^3- in solution is 4.6×10^-11M

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Calculate [HY^3-] in a solution prepared by mixing 10.00 mL of 0.010 0 M VOSO₄, 9.90 mL of 0.010 0 M EDTA, and 10.0 mL of buffer with a pH of 4.00

Short Answer

Step by step solution

Given Information

Determine concentration of VO2+ and VOY2-

Determine concentration of HY3-

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Calculate [HY3-] in a solution prepared by mixing 10.00 mL of 0.010 0 M VOSO4, 9.90 mL of 0.010 0 M EDTA, and 10.0 mL of buffer with a pH of 4.00

Short Answer

Step by step solution

Given Information

Determine concentration of VO2+ and VOY2-

Determine concentration of HY3-

One App. One Place for Learning.

Most popular questions from this chapter

Recommended explanations on Chemistry Textbooks

Chemistry Branches

Nuclear Chemistry

Chemical Reactions

Organic Chemistry

Chemical Analysis

Physical Chemistry

Study anywhere. Anytime. Across all devices.

Calculate [HY^3-] in a solution prepared by mixing 10.00 mL of 0.010 0 M VOSO₄, 9.90 mL of 0.010 0 M EDTA, and 10.0 mL of buffer with a pH of 4.00