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    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
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    Work out the moles of each using n=cv - making sure all of your values are in their SI units.
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    (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..
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    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?
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    (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
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    (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
    ohhhh, haha thankyou! I understand now
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