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Im pretty sure part a was a dehydration with concentrated sulfuric acid dehydrating the copper crystals causing the color change. I completely agree with the two many calculation, also allot on titration's which sucked.

I dont think i did get question 20 wrong. (If i did though serves me right). The question was How does the fossil record provide evidence to support the concept of punctuated equilibrium. The answer is the fossil record is incomplete (A) as the theory of punctuated equilibrium would explain why...

Thought the test was pretty easy, I'm pretty sure i got full marks in the MC (wrote down my answers on exam) and am hoping to have got somewhere in the 90's. My answers for the MC are 1B 2C 3B 4C 5B 6D 7B 8B 9C 10D 1A 12B 13A 14B 15B 16A 17C 18A 19A 20A

I said its because a strong acid and a strong base produce a salt and water, 100% guessing though.

Re: Chem How HARD!! Does anyone know what liquid X was? i guessed sulfuric acid and talked about it dehydrating the copper sulfide crystal thing.

I should have got around 80/100 but anything above 70 will be AWESOME!!!