Question

What is the value of x, the acid concentration of the first solution?

A) 0.05
B) 0.10
C) 0.15
D) 0.20

Answer 1

B or 0.05

Explanation:

Edgenuity 2020

Answer 2

A) 0.05

Explanation:

Let's summarize into an equation the information we can get from that table.

We have 4 liters of an acid of an unknown concentration, let's call it (4x).

We have 10 liters of an acid with known concentration of 0.40.

And we have a total of 14 liters overall with a concentration of 0.3o.

That's like a weighted average formula: 4x + 10 y = 14z

Let's replace the concentration values we know and solve this:

4x + 10 (0.4) = 14 * 0.3

4x + 4 = 4.2

4x = 0.2

x = 0.05

So, the concentration of the 4 liters of acid on concentration X are in fact of concentration of 0.05.