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AS chemistry help?

How would you approach this question?

Which of the following contains the most chloride ions?
[1 mark]
A 10 cm3 of 3.30 × 10–2 mol dm–3 aluminium chloride solution
B 20 cm3 of 5.00 × 10–2 mol dm–3 calcium chloride solution
C 30 cm3 of 3.30 × 10–2 mol dm–3 hydrochloric acid
D 40 cm3 of 2.50 × 10–2 mol dm–3 sodium chloride solution
Reply 1
Avatar for Kozmo
Kozmo
10
Work out the moles of each using n=cv - making sure all of your values are in their SI units.
Reply 2
Avatar for derpz
derpz
5
Original post by Jariana
How would you approach this question?

Which of the following contains the most chloride ions?
[1 mark]
A 10 cm3 of 3.30 × 10–2 mol dm–3 aluminium chloride solution
B 20 cm3 of 5.00 × 10–2 mol dm–3 calcium chloride solution
C 30 cm3 of 3.30 × 10–2 mol dm–3 hydrochloric acid
D 40 cm3 of 2.50 × 10–2 mol dm–3 sodium chloride solution


Use moles = concentration x volume and the highest moles is the answer.

Remember to convert cm3 to dm3 before..
The answer is B based on the mark scheme, but i am confused as B and C both equal 100??

Someone please explain this to me?
Original post by fdtyyyyyyyyyy
The answer is B based on the mark scheme, but i am confused as B and C both equal 100??

Someone please explain this to me?


Look at the formulas of both those compounds. See if theres something different about the number of chlorine atoms :smile:
Original post by xXx-Mr-Today-xXx
Look at the formulas of both those compounds. See if theres something different about the number of chlorine atoms :smile:


ohhhh, haha thankyou! I understand now:h:
Reply 6
Avatar for riyad1234
riyad1234
14793218349271811821167.jpghelp

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