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Chemistry titration kinda question

10cm3 bleach contains 6.05x10^-3 mol ClO- ions. what does 1dm3 of the same bleach contain? And thus find the concentration.

I know it's a simple ratio question but I still don't get it
I'd be really nice if someone can explain it

(edited 4 years ago)

Reply 1

Aaisha8908

Idek

(edited 4 years ago)

Reply 2

p_helena

Hey guys, I don't have a calculator on me so can't work out the answer, but here's a method I used when doing A-Level Chemistry that helped me get titration qs right (even though I'm mathematically illiterate XD)

First, look at the units of the thing you're trying to find.
As you are looking for the amount of bleach, in moles, within 1dm3 of solution, you are looking for the concentration.
Write out the units of concentration like this
Moles = concentration.
dm3
(as in moles divided by dm3 equals concentration).

You have the number of moles of bleach already (6.05 x 10^-3), and you also have the volume of solution- 10cm3. Convert this into dm3 as concentration is moles per dm3. This means your volume = 10/1000.

My chemistry teacher made us draw "titration triangles" with moles at the top, and conc and volume at the bottom.

Moles
Conc x volume

If you need to find the conc, cover up conc to give you moles/volume. Same goes for other equations.

Sorry if I worded this badly!
H

Reply 3