Question

A a 50.00-ml sample of bleach solution contains 0.233 M HClO and 0.499 M Nacio. The K, of hypochlorous acid is 3.0 x 10-8 Find the pH of the solution. C The solution is then divided in half. A) To one half of the original solution, 10.00 mL of 0.100 M NaOH is added. What is the final pH of this solution? B) To the other half of the original solution, 1.00 mL of 0.100 M HCl is added. What is the final pH of this solution?

Answer 1

O. 5000m2 of 0.233M Hclo contains = 11.65 mmales 50.0 m2 of 0.499 m Naclo contains: 24.95 mmales ba (Ho) -- Rau Ka • - da (3-ox 1c-8), 4:53 EHClOJ pH = pka + lag (Nacloſ = 7.52 + log (Aa) (pH = 7.85 A) One half of the original solution contains c [Halos = 11:65 - 5.825 mnales : [Nacios= 24.95 = 12,475 mmates 10.0m2 otol NaOH contains = 1.0 mmales HUO (aq) + NaOH Caq) Nado (aq) + H2oce) guitial 5.825 12.475 1.0 final 13.475 - 4.825 2 7.52 + lsa 113.475 pH = pka alca Nacio lag Encos 14.825 pH = 7.97) B) 1.0 m2 of 0110mHel contains a oilmmals Nacio (aq) + HCl caq) → HClO caq) + Macicales Initial 12.475 5.825 12.375 5.925 2 ) 04. .pH = pka + log [Nado] = I theo 7.52 +0 112375 7 15.925 CS Scanlat 7,841 CamScanner