00:01
So for a certain experiment, a student requires 100 milliliters of a solution that has 8 % hcl.
00:12
The store room has only solutions that are 5 % hcl and 15 % hcl.
00:18
How many milliliters of each available solution should be mixed to get 100 milliliters of 8%.
00:25
So let's add x be equal to the amount of liquid that we put.
00:34
Put based on our 5 % hcl.
00:41
And we'll let, well, we have a total amount of 100 milliliters, so that's the remaining amounts of liquid.
00:47
That's gonna be our amount of, or 15 % hcl.
00:56
So we're gonna have 5 % times that x, and then we have plus 15 % times 100 minus x.
01:07
And that should be equal to so we want a 100 milliliter solution with an 8 % hcl, so that's 0 .08 times 100.
01:20
Okay, so let's multiply through what we have...