33. a) How many grams of sodium hydrosulfite should be taken to prepare 15 liters of a 5% solution (ρ = 1.037 g / ml)? What is the normal concentration of a solution? In public catering, for storage of peeled potatoes, it is treated with a solution of sodium hydrosulfite. b) How many grams of caustic potassium are contained in 2 liters of a solution whose pH is 12?

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