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What weight of potassium bromide, KBr, could be recovered by evaporating 650.0 g of 15.0 percent KBr solution to dryness?

  • chem -

    15% KBr (w/w) means 15 g KBr/100 g soln. So how many grams KBr will you find in 650 g? That will be 15 x 650/100 = ? That's how much you can obtain by evaporation assuming good lab technique.

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