An alkalinity test measures the level of
a : Carbonates only
b : Hydroxides only
c : Bicarbonates, carbonates, and hydroxides
d : None of the above

Higher is the alkalinity in water easier it is for pH change.
a : False
b : True

Excessive alkalinity level in human body can
a : Expel the unwanted pathogens in the bloodstream
b : Cause skin irritations
c : Lead to gastrointestinal issues
d : All of the above

Data obtained from alkalinity is used for following engineering practices.
a : Chemical coagulation of water and waste water
b : Water softening
c : Corrosion control
d : All of the above

Majority of mineral water supplied is mostly
a : Acidic
b : Neutral
c : Alkaline
d : None of the above

Alkalinity measurements are used in the interpretation and control of waste water treatment process.
a : False
b : True

Why does the procedure call for a sample containing no more than 60 mg of Mg²⁺?

Why is the solution acidified with HCl before adding the precipitant?

Why is the acid–base indicator methyl red added to the solution?

Explain why forming Mg(PO₃)₂ instead of Mg₂P₂O₇ increases the precipitate’s mass.

What additional steps, beyond those discussed in questions 2 and 3, help improve the precipitate’s purity?