Please help with questions 25, 26, 27, and 28!
I would be happy to help you but the questions are not visible , please post the questions
Im sorry I put a picture and I guess it didn't go through! Here is the question:
"I put an unknown acid or base in water. The Molarity of the hydronium ions is 1.0 x 10 ^-3. Answer the next four questions.
25. Was the unknown an acid or a base?
26. How do you know?
27. What is the molarity of the hydroxide ions?
28. What number would this unknown be on the pH scale?"
The formula to figure out pH is
pH = -log (H3O+)
so the pH = -log(1 * 10^-3) = 3
pH<7 means that it is acid.
So 25. the unknown is acid , 26.we know this because of pH calculated from concentration of hydronium ions and pH is < 7
27. to find the molarity of hydroxide ions we use formula Kw =[H3O+][HO-] = 1.0*10^-14
[HO-] = 1.0*10^-14 / 1.0*10^-3 = 1.0 *10^-11
28. pH = 3 and this is acid.
Let me know if you have any questions
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