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Write chemical equations corresponding to these observations: a. When Cr(NO3)3 is dissolved in water, the pH decreases....

Write chemical equations corresponding to these observations:

a. When Cr(NO3)3 is dissolved in water, the pH decreases.

b. When the pH of a 1.0 M solution of Mg2+ is raised above 8.5, precipitation occurs.

c. A precipitate of aluminum hydroxide can be redissolved with 6 M KOH.

d. A precipitate of aluminum hydroxide can be redissolved with 6 M HNO3.

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Answer #1

Aluminum hydroxide is very less soluble in water but soluble in acid and base.Solution Ca COn HNO3 gelabihous pH dooeae due to ntic add fomation at ained p, oH- Concentatron wiu be high uin Aolutron,do .

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