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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

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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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