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28. Solving a chemistry problem
Uploaded: 23.04.2023
Content: 5з.rar 27,35 kB
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5. To 200 g of a 5% solution of Pb(NO3)2 was added 50 g of a 4% solution of sodium sulfide. The resulting black precipitate was treated with an excess of H2O2 solution, and the precipitate turned white. Write the reaction equations and calculate the masses of black and white precipitation.
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