Question

Walk me through this?
What would be the resulting molarity of a solution made by dissolving 25.4 grams of KOH in enough water to make a 985-milliliter solution? Show all of the work needed to solve this problem

Answer 1

It is a strong base, so assume that it dissociates quantitatively.

Find the number of moles of KOH. Once you have done that, divide the number of moles by the volume of the solution, expressed in litres. That will give you the molarity.

Answer 2

How do I find the moles

Answer 3

hmmm

Answer 4

mole= mass/Mr

Answer 5

u r given a mass of KOH and you can find Mr from periodic table

Answer 6

the mass is 25.4 right?

Answer 7

yes :)

Answer 8

Okay so the moles is 0.453

Answer 9

yupp

Answer 10

Do I have to convert milliters to liters?

Answer 11

yes :)

Answer 12

0.985 liters

Answer 13

So after I divided it I got 0.459

Answer 14

so now what do u do next?

Answer 15

There's more?

Answer 16

yes

Answer 17

molarity

Answer 18

what is the formula?

Answer 19

M = moles solute/liters solution

Answer 20

so do it :)

Answer 21

Okay so is the 0.459 the moles solute or the liters solution?

Answer 22

wait

Answer 23

its 0.453 moles

Answer 24

volume is 0.985 L
all as u said

Answer 25

so molarity = mole/ volume

Answer 26

0.459 is the answer i got

Answer 27

oh lol u've become quite fast i didn't realize lol

Answer 28

round to 0.460 M :D

Answer 29

good jooob :D i see improvement <3

Answer 30

Thank you:)

Answer 31

u r welcome :D