SCS Yr 10 Hard Water

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

Water that runs over limestone rock forms.....

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

Water that runs over gypsum rock forms.....

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

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

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

If water contains calcium and sulphate 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

This type of water lathers easily

• soft

• temporary hard

• permanent hard

• ice

What causes insoluble calcium carbonate to become soluble?

• Rain

• Sunlight

• Acid rain

• The air

Identify the insoluble compound

• calcium carbonate

• calcium sulfate

• calcium hydrogen carbonate