00:03
Hi there.
00:04
In this question, we have a dilution problem because we are starting with a stock solution that is two molar, and we're trying to make a less concentrated solution.
00:16
So this is a dilution problem, and the formula that we use for dilution problems is m1 times v1 equals m2 times v2, where m is molarity, v is volume, the ones represent the stock solutions or that initial solution we're starting with, and the twos represent the diluted solution.
00:42
So we have four variables in this equation, and we see from the problem that we are given three of the four values.
00:49
So we can solve for that fourth one.
00:52
So we are starting with a 2 .00 molar solution, and we're trying to determine what volume of that we need to make a 0 .1 molar solution.
01:10
And we want 500 milliliters of that.
01:19
Notice all of our numbers here have three significant figures.
01:23
So when we get our answer, we need to express it as three significant figures...