Alkalinity

Question 1

What is the titrant for Alkalinity?

Answer 1

0.02N Sulfuric Acid

Question 2

What is the target pH for total alkalinity?

Answer 2

4.5 +/- 0.2 pH

Question 3

what is the titrant volume multiplication factor

Answer 3

50 mL sample X by 20
100 mL sample X by 10

Question 4

Certified Analyst testing requirement

Answer 4

once every 3 months

Question 5

Max holding time for samples

Answer 5

14 days refrigerated. Immediate reccomended

Question 6

How often does the titrant need to be Standardized?

Answer 6

Once a month

Question 7

What are the expiration dates for standards and reagents

Answer 7

1 year from opening or commercially given exp. date

Question 8

First step in Alkalinity testing procedure

Answer 8

Calibrate the pH meter

Question 9

How often does the titrant need standardized

Answer 9

When opened, and once a month

Question 10

How much DI water is used to standardize the titrant

Answer 10

30 mL

Question 11

How much 0.02N sodium carbonate is used to standardize the titrant

Answer 11

20 mL (added using a volumetric pipette

Question 12

How many repetitions is necessary for standardization

Answer 12

2X (duplicate DI samples)

Question 13

What is the acceptable range of titrant needed for standardization

Answer 13

+/-5% nominal (19.0-21.0 mL)

Question 14

When can you apply a correction factor

Answer 14

On laboratory prepared titrant

Question 15

How to calculate the correction factor

Answer 15

20 mL / average of three titrations

Question 16

Which titration method do we use

Answer 16

Potentiometric