Re: How would you make a solution with an acid or base?

Assuming you have teeth that are NOT inside a living organism
( what I'm about to suggest would be dangerous otherwise), you could get 
1 M acid from a pharmacist.  That would be too strong; teeth normally don't 
come into contact with such a high concentration of acid. For every 10 ml
of 1 M acid use 90 ml of water ( in other words dilute 10 ml of 1 M HCl to 
100 ml ) That will raise the pH to 1, still more that fifteen times more 
acidic than lemon juice. ( If you cannot find HCl, use freshly squeezed 
lemon juice .)

As for a base, use household ammonia, as is. That'll be at pH 12, more than 
30000 times more alkaline ( basic) than blood, which is slightly alkaline 
because of its bicarbonate content. If ammonia is not available, dissolve 
as 
much baking soda as you can in water.