Which solution has the greatest number of hydrogen ions?
blood, ph = 7.2
lemon juice, ph = 2
soda, ph = 3.5
bleach, ph = 13.5

Option b, lemon juice will have highest number of hydrogen ions.

Explanation:

As we know that

Taking the antilog on both sides,  we get -

Thus, the hydrogen ion concentration of all the solutions given as option is

a) Blood :  

b) Lemon juice :  

c) Soda :  

d) Bleach :  

The solution with hydrogen ion concentration having the highest negative power of 10, has the lowest number of hydrogen ion.

Thus, option b, lemon juice will have highest number of hydrogen ions.

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explanation: