a solution of salt contains 500 gram of salt per litre of solution.how many litres of water must be added to 15 litres of the solution to obtain a solution with 150 gram of salt per litre of it?
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Answers
Answer:
We can make 10 percent solution by volume or by mass. A 10% of NaCl solution by mass has ten grams of sodium chloride dissolved in 100 ml of solution. Weigh 10g of sodium chloride. Pour it into a graduated cylinder or volumetric flask containing about 80ml of water.
Step-by-step explanation:
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Answer:
One litre of water is evaporated from a 6 litre solution containing 4% sugar. The percentage of sugar in the remaining solution is:
Sugar solution = 6 litres
concentration of sugar is 4% which is about 0.24
since 1 litre water has evaporated still same amount of sugar will remain in the solutions of 5 litre
so concentration now is 0.24 / 5 = 4.8 %
Answer for 1 is (c) 4.8 %
in the same approach
salt % = 150g of salt in 75% of water remaining
150/7.5 = 2 %
follow this method....
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