Question 3
1 answer:
Answer: 0.118M
Explanation:
The formula for molarity is:
First, we need to find the number of moles of NaCl.
Next, we must convert millimeters to liters. We can do that by dividing the number of mL by 1000.
Now we have our needed data! All we need to do now is plug in our data to the molarity formula.
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383.5 grams is the mass of water should be added to 22.0 g of KCl to make a 5.50 % by mass solution.
Explanation:
Given that:
Solution to be prepared is 5.5 %
mass of KCl is 22 gram
mass of water required =?
5.5 % solution means that
5.5 grams in 100 ml or gram of water to make solution.
let the water required is 5.5 + x, so the equation will be
5.5 = x 100
121+ 5.5x = 2200
5.5 x = 2200-121
x =
x = 378 grams
The mass of water added to KCl to make it 5.5% percent solution is
5.5 +378
= 383.5 grams.
to make the solution of 5.5 percent of KCl weighing 22 grams.