Question

Find the pH of:
an aqueous solution containing 0.073 g HCl in 2.00 L water

Answer 1

given mass = 0.073 g
find moles of HCL = 0.073 / 36.5 = 0.002 moles

find molarity by dividing 0.002 by 2

molarity = 0.001

Ph = -log (H+)
ph = -log(0.001)

solve this to find the Ph

Answer 2

ok, thanks for the working but why can you use log (0.001)?
like why does (H+) = molarity of 0.001?

Answer 3

molarity gives the concentration of a solution ...