Can someone check these organic chemistry questions? 10 Points!?

http://imgur.com/a/nh31u

I don’t know what I’m doing wrong on these problems. The first one, i just cant seem to get the nucleophiles. The second and third one, are the rates and pictures correct?

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  • Reaction 1: You need the conjugate base, acetate ion, for the nucleophile. The acid will not work.

    Reaction 2: Assuming both will proceed via an SN1 mechanism, the tertiary halide is faster.

    Reaction 3. The reaction is SN1, the rate is determined by [RCl]. Both are 1.5M; Equal rates.

    NOTE: In reaction 3 the product is the methyl ether, not the alcohol.

  • The first one looks right to me, but on the second and third one, wouldn’t the reactions occur by the SN1 mechanism, since they are all (except for one) tertiary halogenoalkanes? And the second one on the second page could occur by either mechanism since it is a secondary halogenoalkane. Also, on the bottom page, I can’t really tell if the OH group is supposed to be connected to a carbon chain. If so, it probably wouldn’t just completely detach and bond to the other chain. I think it would probably produce an ether instead.

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