Solutions Continued ❗️

Question 1

What is pH? How is it calculated?

Answer 1

pH=-log[H+]

Question 2

What does [H+] equal to? (10^)

Answer 2

[H+]=10^-pH

Question 3

What is pH + pOH equal to?

Answer 3

14

Question 4

Calculate pH of 0.0001M NaOH solution.

Answer 4

[OH-]=0.0001=1 * 10^-4
pOH=1 * 10^-pOH
pOH=4
pH=14-pOH
pH=10

Question 5

pH=5 What is the concentration of OH- and H+ ions?

Answer 5

pH=5
pOH=14-5=9
[H+]=1 * 10^-pH
[OH-]=1 * 10^-pOH
[H+]=1 * 10^-5
[OH-]=1 * 10^-9

Question 6

What is pH equal to pKa+ what?

Answer 6

pH= pKa+log ([conjugate base (salt)]/[weak acid]

Question 7

What are colligative properties? State all kinds.

Answer 7

all properties that depend on the number of molecules in a given volume of solvent and not on the properties/identity (eg. size or mass).
- vapour pressure
- melting point
- boiling point
- osmotic pressure

Question 8

What is Raoults Law?

Answer 8

P(solution)=X(solvent)Po(potential)

P(solution)= vapour pressure of solution
X(solvent)= mole fraction of the solvent
Po(solvent)= vapour pressure of the pure solvent

Question 9

What are the three types of solution pressures?

Answer 9

isotonic
hypertonic (solute conc. outside the cell is greater than inside)
hyponotic (solute conc. inside the cell is greater than outside)