Ask questions, share knowledge, and connect with a vibrant community on IDNLearn.com. Join our community to access reliable and comprehensive responses to your questions from experienced professionals.
Sagot :
Answer:
-6.15
Explanations
The formula for calculating the pH of a buffer is expressed as
[tex]pH=pka+log\frac{[salt]}{[acid]}^[/tex]pka of the hydrochloric acid = -6.3
Calclate the moles of the HCl and sodium acetate
[tex]\begin{gathered} moles=molarity\times volume \\ moles\text{ of HCl=0.676M}\times0.275 \\ moles\text{ of HCl=0.1859moles} \end{gathered}[/tex]Calculate the moles of sodium acetate (salt)
[tex]\begin{gathered} moles\text{ of sodium acetate=0.525M}\times0.500 \\ moles\text{ of sodium acetate=0.2625moles} \end{gathered}[/tex]Substitute the given parameters into the formula
[tex]\begin{gathered} pH=pka+log\frac{[0.2625\text{/v}]}{[0.1859\text{/v}]} \\ pH=-6.3+log1.4121 \\ pH=-6.3+0.1498 \\ pH=-6.1502 \end{gathered}[/tex]Hence the pH of this buffer is approximately -6.15
We appreciate your participation in this forum. Keep exploring, asking questions, and sharing your insights with the community. Together, we can find the best solutions. IDNLearn.com is committed to providing the best answers. Thank you for visiting, and see you next time for more solutions.
