Analysis of Hard Water & Treatment

"Turbidity" is the measure of a body of water's ____________________________.

• cloudiness
• eutrophication
• temperature change
• flocculation

The ions that cause hard water are;

• Calcium and Manganese ions
• Calcium and Magnesium ions
• Carbon and Magnesium ions
• Carbon and Manganese ions

Tags

NGSS.HS-ESS2-5

Soft water is water that;

• Does not lather
• Lathers with difficulty
• Lathers easily
• Does not form bubbles

If water contains calcium and hydrogen carbonate ions, it is described as....

• temporarily permanently soft water
• Soft water
• Permanently hard water
• Temporary hard water

Boiling can be used to make which type (s) of water soft.

• Temporary and  permanent hard water
• Soft water
• Permanently hard water
• Temporary hard water

Tags

NGSS.HS-ESS2-5

The method that uses resin beads in a column

• Boiling
• Washing soda
• Ion Exchange
• Washing powder

Which of the following does not cause the permanent hardness in water?

• Nitrates

• Sulphates

• Chlorides

• Bicarbonates

Ion-exchange resin is ____________

• Linear

• Low molecular weight

• Organic polymer with porous structure

• Soluble

In _____________ when the water is heated then the soluble salts turns into insoluble ones and removed by filtration.

• Temporary hardness

• Permanent hardness

• Non-carbonate

• Non-alkaline

The chemical formula of zeolite is ___________

• FeSO₄.7H₂O

• Na₂Al₂O

• Al₂(SO₄)₃.18 H₂O

• Na₂O.Al₂O₃.xSiO₂.yH₂O