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Hey does anyone have the 2009 Catholic Maths Ext 2 trial paper solutions? Thankyou

Use the table to answer parts (a), (b). (a) The equivalence point in a titration between 0·10 mol L–1 HCl(aq) and 0·10 mol L–1 NH3(aq) occurs at about pH 5·5. (i) Give ONE reason why phenolphthalein is not a suitable indicator. (ii) Select an indicator (b) From the data, suggest a...

The question is worth 6 marks! How would you answer it to gain all marks? Chromosomes and DNA have a central role in sexual reproduction. Identify the role of Chromosomes and DNA in this process. Include in your answer the importance of replication and genetic variation.