In A Science Project About Eggs,water, Salt, And Vinegar. Which Will Dissolve First?

I researched this a bit. I found that in an acidic media there would be a displacement of the Calcium Carbonate of the egg shell by the Sodium ions making the shell a weaker Sodium Carbonate which is basically laundry detergent and much weaker. So the answer is probably water with vinegar with salt. CaCO2 vs Na2CO2

Jar 2 will dissolve faster.

I think that your birth will affect your mom.