OCR AS Level Chemistry A Breadth in Chemistry May 2016 H032/01 Q1-20

QUESTION 9 IS C BUT NOT A ( look the the electron numbers and add them, therefore A=2 B=6 C=8 and D=2) here the obvious answer is C as 8 is a Nobel gas therefore hardest to remove its outer electron, thank you, sorry for the mistake!

QUESTION 11 the correct equation is 2AgNO3 + H2SO4 to Ag2SO4 + 2HNO3

QUESTION 12 the arrows are meant to be pointing down because the values given are for combustion

Hello guys!

Comment any questions and recommendations for future uploads :)

[london-uicf]

question 9- the answer is not A, but c...

[flynnff]

Question 12, I don’t see how the final calculation can equal -129. I’m even putting it into my calculator and every way I do it I come to +129

[raman]

For question 11, your equation is incorrect. Silver nitrate and sulphuric acid produces Ag2So4 and HNo3. AgSo4 is incorrect because Ag+ and So42- does not make AgSo4 due to the charges. I suggest to double check the working outs x

[raman]

For question 20, statement B is correct but just doesn't explain the different rates.