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    • Thread Starter

    first time user here!
    I'm having a mega mind blank and cannot for the life of me gain a single mark on this question! Explanations would be amazing as I don't even know where to look for these answers in the AQA text book!
    Thanks in advance!

    The question:
    Table 5 shows observations of changes from some test-tube reactions of aqueous solutions of compounds Q, R and S with five different aqueous reagents. The initial colours of the solutions are not given.

    Table 5

    BaCl2 + HCl
    Q: no change
    R: no change
    S: white ppt

    Q: pale cream ppt
    R: white ppt
    S: no change

    Q:white ppt
    R: white ppt, dissolves in excess of NaOH
    S: brown ppt

    Q: white ppt
    R: white ppt, bubbles of a gas
    S: brown ppt, bubbles of a gas

    HCL (conc)
    Q: no change
    R: no change
    S: yellow solution

    identify Q,R and S. You are not reqiured to explain your answers *although that would be mega helpful obviously xD*
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