Imagine that you are in chemistry lab and need to make 1.00 L of a solution...

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Chemistry

Imagine that you are in chemistry lab and need to make 1.00 L ofa solution with a pH of 2.50.
You have in front of you
100 mL of 7.00Ã—10^âˆ’2M HCl,
100 mL of 5.00Ã—10^âˆ’2M NaOH, and
plenty of distilled water.
You start to add HCl to a beaker of water when someone asks youa question. When you return to your dilution, you accidentally grabthe wrong cylinder and add some NaOH. Once you realize your error,you assess the situation. You have 81.0 mL of HCl and 90.0 mL ofNaOH left in their original containers.
Assuming the final solution will be diluted to 1.00 L , how muchmore HCl should you add to achieve the desired pH?
Express your answer to three significant figures and include theappropriate units.

Answer & Explanation Solved by verified expert

3.7 Ratings (427 Votes)

Volume of HCl to be added 333 mL Explanation pH 250 H 10pH H 10250 H 316 x 103 M moles H to be added molarity H volume of solution moles H to be added 316 x 103 M 100 L moles H to be added 316 x 103 mol moles HCl to be added moles H See Answer

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