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    does any one have unofficial ms
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    Chemistry GCSE edexcel C3 unofficial ms
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    The question on ethyl ethanol the confused me because it asked for the formula of it which is obviously C4H8O2 however, the rest of it was drawn so I didn't know whether to draw it or just write it out.
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    (Original post by Heardmanator)
    The question on ethyl ethanol the confused me because it asked for the formula of it which is obviously C4H8O2 however, the rest of it was drawn so I didn't know whether to draw it or just write it out.
    what? you had to draw ethyl ethanoate
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    I drew it
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    (Original post by caitlinford3)
    what? you had to draw ethyl ethanoate
    The question asked for formula so I was unsure of which to do, whether to draw it or literally state the formula.
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    did the question ask for disadvantage for domestic use of hard water or advantage. i forgot
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    the question on the second page
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    (Original post by MohAhmedRS)
    did the question ask for disadvantage for domestic use of hard water or advantage. i forgot
    Disadvantage
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    what did you write for the impurities question. why they were desposited there.
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    also did it ask for the formula and name for ammonium hydroxide.
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    (Original post by MohAhmedRS)
    also did it ask for the formula and name for ammonium hydroxide.
    I think it just wanted the hydroxide and the formula as OH^-. Well thats what I put.
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    do you think i will still get the marks if i put NH4OH and Ammonium hydroxide
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    (Original post by Heardmanator)
    The question asked for formula so I was unsure of which to do, whether to draw it or literally state the formula.
    I did both. I drew it and write the formula.


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    What did you write for the question about the dissolved solids in hard water- it was a question like how would you identify them without using soap. I put adding Sodium Hydroxide and then white precipitate for identifying calcium ions. Is that right?


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    hard water contains aluminium because aluminium sulphate is added to remove small solids in water however the disadvantage to this is that high aluminium levels has links to alzheimers disease.
 
 
 
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