Question

Calculate the mass of KH2PO4 needed to make 100 mL of a solution that is 300 mg PO4-3/L. 2. Calculate the mass of NaNO3 and NaNO2 to make 100 mL of a solution that is 500 mg/L in both nitrate and nitrite. You will be adding both salts to a single solution.

Answer 1

2018 o . 06 – WEEK - 01 / DAY (006-359) Saturday, 01 mot. wt. of KH2POq = 136.09 ghuur. 7 100 м. 3 500 wTIL Concentration 3 (0.3 / 136.09) must/ s 0.002 M2 1000 m 2 (M) KH ₂ P Qq = 136.09 g Kth Poa I m 1 (ms = 136.0 porou 100 m 0.002 M 100 = 0.072.72 27.2 ng 27.2 ng kth Poa will be required. 136.09X100X 0.002 ng * Not. Wt. of Nanoz: 85 g/mol 500 mg/ 1 0.5g/1 (0.5/85) uut / L = 0.006 (M) 1000 m2 IM NaNO₃ E 85gfu 100 me 'O,006 M U . 85 X 100 x 0.006 Sunday 07 1000 = 0.051 g = 5th 51 mg of HaNO3 will be required Cs Scanned with CamScanner

mot. wi- os NONO = 67 g/mer, 500 mg/l ? 0.5g/? (0.5/69) mot / 10.00 of not 1000 m (M) = 69 g HaNO2 100 m 0.007 M) ² 69 x 8.007 x 1oo. 0.059 = 50 mg 50 ng hand will be required. di Ics Scanned with CamScanner