You are Here: Home >< GCSEs

# find concentration of chlorine ion

Announcements Posted on
Last day to win £100 of Amazon vouchers - don't miss out! Take our quick survey to enter 24-10-2016
1. A 25cm3 sample from the dead sea gace 17.885g of silver chloride precipitate. Work out the concentration of chlorine ions in dead sea.
2. (Original post by janelopez)
A 25cm3 sample from the dead sea gace 17.885g of silver chloride precipitate. Work out the concentration of chlorine ions in dead sea.
Hmm. This might be tough.

Anyway, I'd guess that:
1 - convert 25cm3 into dm3 by dividing by 1000
2 - work out the percentage of chlorine that comprises silver chloride (AgCl)
3 - multiply the decimal by 17.885 to yield the mass of chlorine
4 - convert what you got for 3 to moles (divide by 35.5)
5 - divide what you got for 4 by what you got for 1

When I did this I got 6.62mol/dm3, but like I said, I'm not entirely sure. I still personally think that this is too complicated for a GCSE question

## Register

Thanks for posting! You just need to create an account in order to submit the post
1. this can't be left blank
2. this can't be left blank
3. this can't be left blank

6 characters or longer with both numbers and letters is safer

4. this can't be left empty
1. Oops, you need to agree to our Ts&Cs to register

Updated: June 16, 2016
TSR Support Team

We have a brilliant team of more than 60 Support Team members looking after discussions on The Student Room, helping to make it a fun, safe and useful place to hang out.

This forum is supported by:
Today on TSR

### How does exam reform affect you?

From GCSE to A level, it's all changing

Poll
Useful resources

## Study tools

### Essay expert

Learn to write like a pro with our ultimate essay guide.

See where you can apply with our uni match tool

### Make study resources

Create all the resources you need to get the grades.

### Create your own Study Plan

Organise all your homework and exams so you never miss another deadline.

### Resources by subject

From flashcards to mind maps; there's everything you need for all of your GCSE subjects.

### Find past papers

100s of GCSE past papers for all your subjects at your fingertips.