Question

What is true about the dilution of a solution?

The amount of solute decreases.

The volume remains the same.

The amount of solvent increases.

The concentration increases.

Answer 1

when you have a glass of coke and you put ice in it, and it melts, it dilutes your soft drink - lowering the initial concentration of solute.

Answer 2

Ok so A, thats what I thought THX!

Answer 3

well no, the amount of solute didn't decrease (the initial matter didn't leave). It's concentration did decrease though (because you added more solvent).

Answer 4

So C?

Answer 5

yep

Answer 6

Mind checking out another?

Answer 7

shoot

Answer 8

since both of the concentrations given are in the same units (by mass or w/w)
you can simply use the C1V1=C2V2 formula.

C=concentration
V=volume

just make sure the units for volume are the same

Answer 9

i guess V should be mass here

Answer 10

exactly

Answer 11

yeah, so you need 81.6 grams of the stock solution and then you would just add water to achieve the concentration of 35.5% by mass

Answer 12

add water until the solution weighs 200 grams

Answer 13

Okay, thanks your AWESOME :)

Answer 14

haha no problem! good luck

Answer 15

use the same formula, C1V1=C2V2, make sure the units are the same.

after you find the volume of stock you need, you need to state that you will add distilled water to the stock solution until you have a total volume of 2 liters.

Answer 16

isnt it M1V1 = M2V2

Answer 17

it's essentially the same thing, since M=molarity is measure of concentration.

Answer 18

yes, but not 0.160 mL

0.16 L or 160 mL

then fill up to 2 L with water <-they're asking you to say this

because if you get 2L then add the 160 mL you'll have a 2.16 L solution that won't be the right concentration either

Answer 19

ok got it! Thank ya

Answer 20

k cool!

Answer 21

the answers is A for the original question