You are working in a chemistry laboratory when you come across a bottle which contains an aqueous solution of hydrochloric acid (HCl). Unfortunately, the person who prepared this solution was very sloppy and did not write down any details about the concentration of this solution! Luckily, you have a pH probe handy and you are able to measure the pH as 0.53. Using the value of pH that you measure, what is the concentration of the HCl solution (to 2 decimal places)? Remember: pH = -log10[H3O+(aq)]
Question
You are working in a chemistry laboratory when you come across a bottle which contains an aqueous solution of hydrochloric acid (HCl). Unfortunately, the person who prepared this solution was very sloppy and did not write down any details about the concentration of this solution! Luckily, you have a pH probe handy and you are able to measure the pH as 0.53. Using the value of pH that you measure, what is the concentration of the HCl solution (to 2 decimal places)? Remember: pH = -log10[H3O+(aq)]
Solution
To find the concentration of the HCl solution, we can use the formula for pH, which is pH = -log10[H3O+(aq)].
In this case, we know the pH is 0.53. We can rearrange the formula to solve for [H3O+(aq)], which represents the concentration of the HCl solution.
So, we have:
0.53 = -log10[H3O+(aq)]
To isolate [H3O+(aq)], we can take the inverse log (or 10 to the power of) both sides:
[H3O+(aq)] = 10^-0.53
Using a calculator, we find that [H3O+(aq)] is approximately 0.29 M.
So, the concentration of the HCl solution is approximately 0.29 M.
Similar Questions
Calculate the pH of the following solution:HCl(aq) concentration 0.0036 mol L-1Give you answer with 2 significant figures (1 decimal place). Remember pH has no units.
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