The number of H3O+ ions present in 10 ml of water at 250C is

[H+]=10-7 of water at 25oC nH+ present in 10 ml of water =10-7×10×10-3nH+ present in 10 ml of water =10-9moleNumber of H+/H3O+ present in 10 ml of water at 25oC = 10-9 x 6.023 x1023Number of H+/H3O+ present in 10 ml of water at 25oC = 6.023 x1014