How much water should be added to 5 gram of salt to obtain 10% salt solution *
2 points
50 g
20 g
40 g
45 g
Answers
Answered by
0
Explanation:
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Answered by
1
Answer:
Given :
Mass of solute = 15 g
Mass % = 15 g
We know :
Mass % = ( mass of solute / mass of solution ) × 100
We can write :
Mass of solution = mass of solute + mass of solvent
Let :
Mass of solvent = y gram :
= > 15 = ( 15 ) / ( 15 + y ) × 100
= > 1 = ( 1 ) / ( 15 + y ) × 100
= > 15 + y = 100
= > y = 85 g
We know :
Density = Mass / Volume
= > Volume = mass / density :
Density of water = 1 g / mL
= > Volume = 85 / 1 mL
= > Volume = 85 mL
Explanation:
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 wate
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