Chemistry Help.....?

Question

Four flask each contain 100mL of aq solutions of equal concentrations at 35C and 1 atm. KCI, CH3OH, Ba(OH)2, CH3COOH.

1. What soltuions are electrolytes?
2. Most acidic + basic?
3. First flask contains 74g of KCl. Calculate Molarity.
4. Second flask contains 30mL of CH3OH. Calculate percent volume/volume.
5. Calculate the grams of Ba(OH)2 in the third flask.
6. Which solution is most likely to react with an acid to form a salt and water?
7. Ba(OH2), CH3COOH, KCl- color of litmus paper? taste? color with Phenolphtalein?


thanks

Answer 1

1. All but methanol are electrolytes to varying degrees.
2. CH3COOH will be the most acidic, Ba(OH)2 the most basic. The other two solutions will be essentially neutral.
3. MW KCl ~ 74 g/mol, so the solution is 10 M (1 mole in 0.1 L of solution).
4. 30% methanol
5. Assuming the equal concentrations part, which is 10 M, there would be 1 mole, or 171.3 g of Ba(OH)2.
6. Ba(OH)2
7. KCl wouldn't turn either litmus paper, as it is neutral. CH3COOH will be red, Ba(OH)2 blue. CH3COOH has a sour taste, KCl salty, Ba(OH)2 would have a soapy taste (should you choose to taste it, which isn't smart). CH3COOH and KCl would be colorless with phenolphthalein, Ba(OH)2 would be pink.

Answer 2

1. KCl
2.CH3COOH, Ba(OH)2
3.Molarity = [74:(39+35.5)] :0,1=
4.
5. Molarity of Ba(OH)2 =?
6.Ba(OH)2
7.Ba(OH)2 make litmus change to blue
CH3COOH make litmus change to red
KCl don't change the color of litmus paper

Ba(OH)2 make phenolphatalein change to pink
CH3COOH and KCl: No color