Water
Authored by Allen Donnelly
Science, Chemistry
4th Grade
Used 11+ times
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15 questions
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1.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
dirty grey scum formation instead of soapy later when washing your hands is a sign of..
Soft water
Hard water
distilled water
sparkling water
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Hard water is...
water that does not easily form a lather with soap – caused by Ca2+ or Na2+
water that does not easily form a lather with soap – caused by Ca2+ or Mg2+
water that easily form a lather with soap – caused by Ca2+ or Mg2+
water that does not easily form a lather with soap – caused by Li2+ or Mg2+
3.
MULTIPLE SELECT QUESTION
45 sec • 1 pt
Hard water occurs only where water has flowed over rocks containing calcium or magnesium compounds, examples of these rock types are..
sandstone
limestone
dolomite rock
granite
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Limestone or chalk is chemically know as..
magnesium carbonate
calcium carbonate
calcium carbonite
calcium di-carbonate
5.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
calcium hydrogen carbonate is .... in water
soluble
insoluble
6.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
.. is one of the most common substances in soap
Sodium stearite
Sodium stearate
Sodium hydroxide
sodium stirrate
7.
MULTIPLE SELECT QUESTION
45 sec • 1 pt
The two types of hardness are ..
permanent hardness
temporary hardness
semi-permanent hardness
all of the above
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