Question

Which of the following is the value of hydrogen ion concentration of pure water?

(a) 1×10^7 moles/litre

(b) 1×10^5 moles/litre

(c) 1×10^6 moles/litre

(d) 1×10^8 moles/litre

I have been asked this question in an international level competition.

My doubt is from pH Measurement and Types topic in division pH Meters and Ion Analysers of Analytical Instrumentation

Answer 1

Right option is (a) 1×10^7 moles/litre

For explanation I would say: The hydrogen ion concentration of pure water is 1×10^7 moles/litre. It can be represented as [H+]=1×10^7 moles/litre.