The Ksp of Al(OH)3 at 25 oC is 1 x 10-33. Consider a solution that is 1.0 x 10-10 M Al(NO3)3 and 1.0 x 10-7 M NaOH. Selected C. Q > Ksp and a precipitate will form. Correct C. Q > Ksp and a precipitate will form.

Answer : and a precipitate will form.

Explanation : Given,

Concentration of =

Concentration of =

of =

The equilibrium chemical reaction will be:

The expression of Q for this reaction is:

Concentration of = Concentration of =

Concentration of = Concentration of =

Now put all the given values in this expression, we get:

There are 3 conditions:

When ; the reaction is product favored.   (No precipitation)

When ; the reaction is reactant favored.   (Precipitation)

When ; the reaction is in equilibrium.  (Sparingly soluble)

As, the is more than . The above reaction is reactant favored. This means salt or precipitate will be formed.

Hence, the and a precipitate will form.

metals are good conductor of electricity. it has free electrons on their surface. according to electron pool theory, each atom present in a metal crystal losses all of its valence electron and as a result a pool of free is form. these pool of electrons are free to move and   conduct electricity easily   while making metal as good conductor.

the correct answer is a. the ability of electrons to flow throughout the metal.

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