Question

(2)what is the% by mass of a solution that contains 50 grams of salt dissolved in 200 grams of solution? what is the concentration in ppm?

Answer 1

what did you try?

Answer 2

you basically need to make a ratio then multiply it by 100 to convert it to %

Answer 3

I know formula but I don't know how to use I tried more one hour nothing I get

Answer 4

molarity

Answer 5

this isn't molarity

Answer 6

you can't use molarity in weight percent formulas because molarity is defined as moles of solute divided by volume (in L) of solution. none which are proportional to mass

Answer 7

which formula am I use and how to solve this type of problem

Answer 8

i don't know of any formulas.. but basically you add the whole mass of everything together.

then divide whatever you're interested in, by the total mass

to turn it into a percent, multiply it by 100

Answer 9

i'm sorry i don't even know what bengali is

Answer 10

ok thank you

Answer 11

it is a language

Answer 12

I will see online book now

Answer 13

okay then !

Answer 14

i don't know
i wish i will get

Answer 15

50g in 200g
200g = 100%
100g = 50%
50g = 25%
So the percent by mass is 25%

Answer 16

thank you

Answer 17

Parts per million is the same as microgram/gram
You have 50g/200g at the moment
Divide them both by 200 to get to xx per 1 gram
50/200 = 0.25
so 0.25g/1g

0.25 gram is 250 000 microgram (1 gram is 1 million microgram)
So the concentration is 250,000 parts per million

Answer 18

And that is the same as 25% because 250,000 is 1/4 part of 1 million

Answer 19

thanks a lot

Answer 20

no problem :)