1 L sample of impure water containing sulphide ion is made ammoniacal and is titrated with 300 " mL of " 0.1 M `AgNO_(3)` solution. Which of the following statements is/are correct about the above reaction?

Options

A. The strength of `H_(2)S` in water is `0.51 gL^(-)`
B. The strength of `H_(2)S` in water is `5.1 gL^(-1)`
C. The conc.of `H_(2)S` in water in ppm is 510
D. The conc.of `H_(2)S` in water in ppm is 51

Answer

A, C

Explanation

mEq of `H_(2)S =` meq of `S^(2-) =` mEq of `AgNO_(3)`
`[(W)/(34//2) xx 1000] = 300 xx 0.1` (n-factor =1)=30
`:.` Wt of `H_(2)S = (30 xx 17)/(1000) = 0.51 gL^(-1)`
ppm of `H_(2)S = (0.51 xx 10^(6))/(10^(3)) = 510`