What is the ph of 0.450 m al(no3)3 [ka for al3+(aq) = 1.00x10-5]? express your answer to two decimal places?

Answer : The pH of the solution is, 2.67

Explanation :

The equilibrium chemical reaction is:

Initial conc.       0.450                   0               0

At eqm.           (0.450-x)                 x               x

As we are given:

The expression for equilibrium constant is:

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

The concentration of = x = 0.00212 M

Now we have to calculate the pH of solution.

Therefore, the pH of the solution is, 2.67

c (diamond),

sio2 (quartz)

the best answer is d because the strong cohesion is caused by the ability of water molecules to undergo hydrogen bonding.

a is incorrect because when water solidifies, it becomes   ice, which expands and occupies a bigger volume for the same mass of water in its liquid state.

b is incorrect because water has high surface tension. besides bonding to itself it hydrogen bonds to other molecules at the top decreasing possibility for breaking of attractive forces.

c is incorrect because the water molecule has oxygen which is highly electronegative and so pulls the electron pair towards itself creating a dipole moment, making the molecule polar.

e is incorrect because water has strong adhesion, ability to stick to other molecules such as glass because of this molecules having stronger hydrogen bonding than water.