How many grams of benzoic acid would be required to react with the naoh sample mention in question 2

The question is incomplete, the complete question is;

2. How many moles of NaOH are there in a 20.0mL sample of an 0.101M solution?

3. How many grams of benzoic acid would be required to react with the NaOH

sample mention in Question 2?

0.247 g

Explanation:

Recall that;

n =CV

n = number of moles

C = concentration

V = volume (in litres)

So;

n = 0.101 * 20/1000

n = 2.02 * 10^-3 moles

The equation of the reaction is;

C6H5COOH(s)+NaOH(aq) > C6H5COO-Na+ (aq)+H2O(l)

Given that the reaction is in 1:1 molar ratio

number of moles of benzoic acid required= 2.02 * 10^-3 moles * 122.12 g/mol = 0.247 g

answer: c. the experiment shows that the red substance experienced a chemical change.

explanation: chemical change is the change in which chemical composition of the substance changes. physical change is the change in which there is no change in chemical composition.

chemical changes are accompanied by following changes:

a) precipitate formation

b) energy is released or absorbed

c) formation of bubbles

d) change in color

as it is given that the red color has disappeared and there is production of gas, it means the red substance has undergone a chemical change.

e