- Joined
- Jul 18, 2008
- Messages
- 272
- Reaction score
- 2
I had a couple of questions from the 2nd topscore test.
First question is from chem.. number 68 (with how much 1M HCl you have to add 20mL of 1M NaOH to get a solution with ph=2). So I know that means you need .02M H+. Anyway, if someone can show me how its done I'd appreciate it.
Also, 74 from orgo. The NMR with m-xylene. So I know its symmetrical. I got the answer right because I knew it had to have only 4 distinct Hydrogens, but, my problem is that I thought it would be 2 singlets and 2 doublets. I know symmetrical H's split once, so would the H I circled in my attachment see both H's or just 1 and be a doublet?
Thanks guys!
First question is from chem.. number 68 (with how much 1M HCl you have to add 20mL of 1M NaOH to get a solution with ph=2). So I know that means you need .02M H+. Anyway, if someone can show me how its done I'd appreciate it.
Also, 74 from orgo. The NMR with m-xylene. So I know its symmetrical. I got the answer right because I knew it had to have only 4 distinct Hydrogens, but, my problem is that I thought it would be 2 singlets and 2 doublets. I know symmetrical H's split once, so would the H I circled in my attachment see both H's or just 1 and be a doublet?
Thanks guys!