A student measures the pH of a solution to be 6.8. Which should the student add if she wants to decrease the pH of the solution?

NaCl
H2O
HF
KOH

Question

A student measures the pH of a solution to be 6.8. Which should the student add if she wants to decrease the pH of the solution?
 	
	NaCl
	H2O
	HF
	KOH

anonymous · Answer

some one help me please (:

anonymous · Answer

post it in the chemistry group 
u may get the answer

anonymous · Answer

The student would want to add KOH. This is the most basic of all the chemicals you listed because of the presence of a hydroxide group.

anonymous · Answer

Remember that H+ ions make something acidic while OH- ions make it basic. Therefore, chemicals with hydroxide groups are typically bases.