Determine the volume at the equivalence point if a 0.100 m naoh(aq) solution is used to titrate the following acidic solutions: (a) 50.0 ml of 0.200 m hbr(aq) (b) 30.0 ml of 0.150 m hno3(aq)

a) NaOH volume at the equivalence point is 100 ml.

b) NaOH volume at the equivalence point is 45 ml.

Explanation:

To calculate the concentration of acid, we use the equation given y neutralization reaction:

where,

are the n-factor, molarity and volume of acid.

are the n-factor, molarity and volume of base

a) If a 0.100 M NaOH (aq) solution is used to titrated with 50.0 mL of 0.200 M HBr(aq).

We are given:

Putting values in above equation, we get:

b) If a 0.100 M NaOH (aq) solution is used to titrated with 30.0 mL of 0.150 M (aq).

We are given:

Putting values in above equation, we get:

find the surface area of the sphere to the nearest square unit. use a calculator.

a. 254 in.2

b. 64 in.2

c. 127 in.2

d. 1,018 in.2