Question

Help? Chemical reactions???

Answer 1

here is the assignment

Answer 2

what question do you have trouble with

Answer 3

all

Answer 4

Well pick a few, we're not going to go over the whole test with you :P

Answer 5

6,7, and 1 in the free response

Answer 6

I hope I'm not too late!

6: This is kind of a trick question. Only one of the substances can produce H2S: C. None of the other substances have a sulfide in them (E is sulfate, SO4).

7: This one is super simple. The final product has to be a solid. Only one of the reactions has a solid a solid as a product. Find it!

1: This one is very tricky and takes a while. You definitely need to spend 15 minutes (the allotted time) and you also need a solubility chart. This is how I would go about it. First's let's see how many ppts are formed by each substance.
A=2, B=1, C=3, D=3, E=2 and F=1
Let's start with AgNO3, it's gonna react 5 times, and each reaction will create 2 compounds (double displacement). I know the compound that is formed with nitrate will always be soluble, so I only need to check what the silver forms. In order: AgNO3, AgNO3, AgCl, AgOH, Ag2CO3. I check these in my solubility table and AgCl and Ag2CO3 are insoluble. So AgNO3 should form 2 ppt. So it's either A or E. Repeat this with each of the compounds, finding out how many ppts are formed by each. Then, make guesses and see if it works!