MediumChemistryHigh School (9–10)GeneralAcids, Bases and Salts › pH and NeutralisationConceptualNumerical
An acid has a pH of 3. It is diluted to 1000 times its volume with water.
Contributed by StemPy LabTry it on paper first. A hint, the key idea and the worked solution are here when you need them.
An acid has a pH of . It is diluted to times its volume with water.
- What is the new pH?
- Can we make the pH higher than by adding more and more water?
Need a reminder? The key ideaShow
pH runs from to : below acidic, neutral, above basic. , so for the pH is , and one step is a factor of ten. For bases, pH pOH. Diluting a strong acid ten times raises its pH by .
The worked solution
Have you tried it?
Work it out on paper first. It is fine to get stuck or make a mistake: that is how we learn. When you are ready, go through the solution one step at a time, and check each step against your own.
Step 1. (a) Three tenfold steps: .
Step 2. (b) No. The pH creeps towards , the pH of water, but an acid never becomes a base by dilution.
Answer: (a) . (b) No.
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