Assignment:
Question 1. Methyl red is a common acid-base indicator. It has a Ka equal to 6.3 x10-6. Its un-ionized form is red and its anionic form is yellow. What color would a methyl red solution have at pH = 7.8?
- green
- red
- blue
- yellow
- violet
Question 2. The Ksp value for lead(II) chloride is 2.4 x 10-4. What is the molar solubility of lead(II) chloride?
- 2.4 x 10-4 mol/L
- 6.2 x 10-2 mol/L
- 7.7 x 10-3 mol/L
- 3.9 x 10-2 mol/L
- 6.0 x 10-5 mol/L
Question 3. Which is not a characteristic property of acids?
- tastes sour
- turns litmus from blue to red
- reacts with metals to yield CO2 gas
- neutralizes bases
- reacts with carbonates to yield CO2 gas