# The pH of a lime is 1.90. What is the #[H_3O^+]#?

##### 1 Answer

#### Explanation:

We know that water undergoes autoprotolysis according to the following equation......

WE know by precise measurement at

Now this is an equation, that I may divide, subtract, multiply, PROVIDED that I does it to both sides. One thing I can do is to take

And thus

And so (FINALLY) we gets our working relationship, which you should commit to memory.....

We have

Back in the day, instead of using calculators to find logs etc, students would have to use logarithmic tables to find

Note that most things that taste good and piquant, limes, lemon, wine, cheese, butter, are acidic.