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15
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Hard water harms the body
causes kidney, gallstone accumulation, cardiovascular diseases, damage to hair and facial skin
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15
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Effect of soda on hard water? (formula)
MgSO4+Na2CO3=MgCO3+Na2SO4
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15
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What salts are included in permanent hardness?
CaSO4,CaCl,MgCl2,MgSO4
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baam
Lose 25 points!
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star
Double points!
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gift
Win 25 points!
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thief
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25
15
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What is water hardness?
Changes in water properties under the influence of Ca and Mg ions contained in water
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15
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equation when reacting with milk of lime
Ca(HCO3)+Ca(OH)2->2CaCO3+2H2O
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banana
Go to last place!
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gift
Win 20 points!
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rocket
Go to first place!
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thief
Give points!
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25
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heart
Other team wins 25 points!
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rocket
Go to first place!
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shark
Other team loses 20 points!
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banana
Go to last place!
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15
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How to remove permanent hardness
effect of soda Na2CO3 MgSO4+Na2CO3->MgCO3+Na2SO4
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15
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Why does limescale build up in household appliances?
to hard water
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