Question

(4) In a solution concentration of hydronium ion is 2.5 10 M then calculate it's pH. What will be it's pOH 7 (Ans: pH-2.6021, pOH-11.3979) (4) Calculate pll of aqueous solution of 0.025 M H,SO, 03076 mol Ans p-13010 79 Calculate pH of aqueous solution of 3.86 10 M (44) Ra(O), Accept that Ba(O), is totally ionized Ans pOH-2.1124, plf-11.8876) 98 pH of one solution is 4.0 than calculate concentration of OH ion By dissolving 1.0g NaOH in water to make it 100.0 ml than calculate pH of the solution (45) Ans :1.0x 10 M (46) (Ans pOH-0.602 1. plH-13.3979 2 hr aqueous solution of 4.0 g NaOH is prepared than Ans pH-12.7 (48) By adding water in 1 ml 0.1 M NaOH and 50 ml solution is prepared than calculate change in pil of solution. Ans: pH-1.6990] (49) pH of aqueous solution of HCI is 2.8. To make pH of aqueous solution 3.8 from 2.8, how much dilution is [Ans: 10 time] (50) 100 ml solution contains 0.49 g H,SO, than calculate (47) calculate its pH required? pH of solution Calculate pH of mixture of 300 ml 0.1 M NaOH, 300 ml (51) [Ans : pH-1.00 0.2M NaOH and 400 ml 0.3 M NaOH. [Ans : pOH-0.6778, pH-13.322 (52) How much gram of NaOH is required to prepare 100 ml NaOH solution for pH=10? [Ans : NaOH-0.0004 g (53) By adding water in 1 ml 0.1 M HCI and 10,000 liter solution is prepared than calculate its pH. [Ans: pH-6.96

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#42 Hydronium ion conc. i.e. [H3O+] = 2.5810 SM pH = – log [H3o + pH = -log (2.5x153) = 2.602059 m 2.6021 Also pH + рон ... - 14 so PH - 14-pH = 14 -2.6021 = 11.3979