Asolution is prepared by dissolving 0.56 g of benzoic acid (c6h5co2h, ka 6.4 ) in enough water to make 1.0 l of solution. calculate [c6h5co2h], , , , and the ph of this solution.

The values of

Explanation:

Dissolving benzoic acid

Water in solution

Step 1:

Mass of benzoic acid dissolved in water

Final volume

The benzoic acid dissociation constant:

The number of moles of benzoic acid:

Molarity of benzoic acid:

Step 2:

Calculate the molarity (M) of benzoic acid.

For this, we must first calculate the molar mass and the number of moles (n) of benzoic acid:

Step 3:

Dissociation equations and the dissociation constants:

Step 4:

The approximation for is 0. (because of autonization)

Step 5:

Symbol x represents the change in the concentrations.

Step 6:

Substituting x into the equilibrium expression:

We must determine if the is much smaller than to decide whether the following approximation is valid or not:

The approximation is not valid since more than of acid is dissociated.

Step 7:

Calculating the concentrations of the species and the :

Use the quadratic formula to calculate .

Thus we can say the results are:

To learn more about pH of the solution, refer:

for step 7 table c on the lab "newtons law of action"   the average time it took the car to travel .25 meters   was 1.92 seconds.

the average time it took the car to travel 0.50 meters was 2.61 seconds

hope this : )

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.

if it's not useful, feel free to report for mistake in answer.