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Characteristics of Acids and Indicators

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

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

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

Solution Preview

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 ...

Solution Summary

The solution examines characteristics of acids and indicators.

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