Reaction rates

1. The problem statement, all variables and given/known data

okay so im going to do a lab on reaction rates, theres a table given (effects of varying concentration)

there are 9 reactions, I will just give one, ( if i can figure this out ill figure out the rest on my own)

so reaction #1 flask A contains 7.50mL of .200M KI
none of .20 M KCI
.0050 M S2O3^-2
1 drop of starch
flask B contains 7.5 mL of .100M S2O8^-2

It says for each reaction determine the concentration of KI, (NH4)2S2O8, and Na2S2O3 that will be present when solution A and B are mixed together. the total volume for each reaction is 20.0 mL.

2. Relevant equations

M1V1=M2V2 ?

3. The attempt at a solution

I'm not sure how to begin this, would I have to use the M1V1=M2V2 ? how would I set it up ?


Correct dillution equation (that's just mass balance) now you have to assign volumes and known concentration to symbols.

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