Question

HCl is labelled as 3.65% (w/v) 10ml of the solution is diluted to 1 lit. The proton concentration in
the resulting solution is​

Answer 1

The proton concentration in the resulting solution is equal to 0.01 M.

• 3.65%(w/v) of HCl means that 3.65 g of HCl is present per 100 mL of the solution.
• So, 10 mL of the solution will contain 0.365 g of HCl in it.
• Now if 10 mL of the solution is diluted to 1 L , the resulting solution has a volume of 1 L and contains 0.365 g of HCl in it.
• Molarity of HCl in resulting solution is equal to the moles of HCl present in 1 L of the resulting solution(i.e. 0.365/36.5=0.01 M).
• Concentration of proton will be equal to the HCl concentration since one proton is present per molecule of HCl.