Acids & Bases

Question 1

How does the body ensure the concentration of the weak acid in blood doesn’t get too high?

Answer 1

• The carbonic acid is broken down, forming CO, which is exhaled via the lungs.

Question 2

Why is a Burette preferred over a measuring cylinder when doing titrations

Answer 2

A burette is more precise

Question 3

What is the difference between a Strong Base and a Weak Base?

Answer 3

The difference between a Strong Base and a Weak Base is their concentration of hydroxide ions (OH-) in water. Strong Bases have a high concentration of OH- ions and Weak Bases have a low concentration.

Question 4

What is the difference between a Strong Base and a Weak Base?

Answer 4

The difference between a Strong Base and a Weak Base is their concentration of hydroxide ions (OH-) in water. Strong Bases have a high concentration of OH- ions and Weak Bases have a low concentration.

Question 5

State why an indicator may not be required for a titration

Answer 5

the reactants are self-indicating

Question 6

Would the pH of solution containing Mg(OH)2 have a differing pH to Ca(OH)2 and why?

Answer 6

Smaller/Lower pH because magnesium is less/sparingly soluble.

Question 7

why is the pH probe washed with distilled water between each of the calibration measurements

Answer 7

to prevent contamination

Question 8

Why is the volume added of a selected acid or base reduced between each pH measurement during and experiment?

Answer 8

To avoid missing the end point