52. Решение задачи по химии №50

4.9. To 20 ml of a sample of water containing nickel, add 10 ml of ammonia solution, 4 ml of dimethylglyoxime, bring to 100 ml and colorimetrically measure at λ=540 nm. The nickel content in the sample is 0.25 mg/l. Calculate the nickel content in the original solution.

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