Chem Acid/Base Molarity Test Review

What is pH?

presence of hydronium ions

What is pOH?

presence of hydroxide ions

How many liters of a 0.427 M solution would contain 0.832 moles?

1.95L

What is a neutralization reaction? Give its general form.

strong acid + strong base makes salt + water
HX + MOH ® H 2 O + MX

The pH of lemon juice is 2.00, what is the pOH?

14-2.00=12

What color would phenolphthalein be in lemon juice?

colorless

How do you tell the difference between a strong acid and a weak acid?

strong acid = HCl, HBr, HI, HNO 3 or H 2 SO 4
weak acid = any other acid

What is a dilution? What equation is used in dilution calculations?

making a solution less concentrated by adding more solvent
M1 V 1 = M 2 V 2

How many moles are in 500.0 mL of a 2.00 M solution of CuSO 4 ?

1.00 mol

What is a Bronsted-Lowry acid? A Bronsted-Lowry base?

acids are proton donors and bases are proton acceptors

Draw a picture of strong, weak, and nonelectrolytes.

picture should have all ions dissociated for strong acids, some together and some dissociated
for weak, and none dissociated for non

How well does each conduct electricity?

strong conducts well, weak conducts weakly, and non doesn’t conduct

What type of substance forms each electrolyte when dissolved in water?

strong acids, strong bases & ionics are strong electrolytes
weak acids and weak bases are weak electrolytes
covalents are nonelectrolytes

0.450 moles in 250 mL would result in what molarity?

1.8 M

What are the two weak bases you are responsible for recognizing?

ammonia, NH 3 and baking soda, NaHCO 3

A substance with a pH of 8.11 would have what concentration of hydrogen ions?

10–8.11 = 7.76 x 10 –9 M

What color(s) would you expect each litmus paper to be in this substance?

blue

How many grams of NaOH are needed to make 1.50 L of a 0.25 M solution?

15g

M1 V 1 = M2 V 2
(0.2 M)(4.5 mL) = (x)(100 mL)

x = 0.009 M

What is the pH of the diluted solution?

– log(0.009) = 2.05

Identify what type of electrolyte each of the following is: CF 4 , NaOH, NaF, HF

CF 4 = non (covalent)
NaOH = strong (strong base, also ionic)
NaF = strong (ionic)
HF = weak (weak acid)

What is the [H+1 ] of a solution with a pOH of 11.5?

pH = 14 – 11.5 = 2.5
10–2.5 = 0.0032 M

C 5 H 5 NH + + F – ⟶ C 5 H 5 N + HF In the reaction above, which substance is the Bronsted-Lowry acid? The Bronsted-Lowry base?

acid = C 5 H 5 NH +
base = F –