O I D0ED SIM öb DACUSS 0.1 M AgNO present Volume of wash water used 200 Im 1.0 ml 500 ml Ans. 0.4036 g. 11. 0.5000 g AgNO3 and 0.7000 g KBr0, are added to 250 ml of water. The precipitated AgBrO3 is...

Questions number 12

Extracted text: O I D0ED SIM öb DACUSS 0.1 M AgNO present Volume of wash water used 200 Im 1.0 ml 500 ml Ans. 0.4036 g. 11. 0.5000 g AgNO3 and 0.7000 g KBr0, are added to 250 ml of water. The precipitated AgBrO3 is collected on a filter and washed with 250 ml of water. After drying in an oven, how much does the precipitated AgBrO3 1.7 weigh? 12. Find the milligrams of Cl- left in solution if 50 ml 0.1 M AgNO3 is added to 200 ml of solution which contains 0.2500 g NaCl. Ans. 3 x 10-4 mg. 13. 40.00 ml 0.5000 M AGNO, is added to 230 ml of water which contains 1.942 g K,CrO4. What percentage of chromium remains unprecipitated? Ans. 0.2%- 14. M(OH)2 is a slightly soluble strong base which dissolves to the extent of 10-6 mole per 100 ml. To 200 ml of 0.1 M MSO, solid NAOH is added. (a) How many grams of NaOH have been added before a precipitate begins to form? (b) What is the pH when 75 per cent of M+2 has precipitated? Ans. (b) 7.60. 15. The solubility of a hydroxide, X(OH)2, is 0.003 g per liter. The olecular weight is 150.