Qualification > Sciences
CHEM AND BIO HELP AND TIPS HERE
Vin:
--- Quote from: MasterMath on June 05, 2010, 02:26:34 pm ---but hmm... How does it neutralize the acidity of the soil without increasing its Ph >_< ?
I got what you mean but im a bit confused
--- End quote ---
CaCO3 insoluble in water, no change in pH. Hence pH remains 7
CaO, partially soluble in water, forms Ca(OH)2- a base, so the pH can go above 7 get it?
MasterMath:
--- Quote from: nid404 on June 05, 2010, 02:27:45 pm ---Carbonate is a salt...so it's pH is neutral
whereas oxide of group 2 metals are alkaline.
--- End quote ---
Righttt >_<.. thanks vmuch
MasterMath:
If you answer questions like using the AS syllabus
for example they ask you why Ammonia is liquid while Nitrogen is gas ..
Cant you say the intermolecular forces in ammonia are hydrogen bonds while nitrogen is VDW?
They said in MS Ammonia has a higher boiling point .. thats true also XD
**RoRo**:
Questionnn! ;D
Explain why metals are often used in the form of alloys?
elemis:
The main reason is since the alloy may (but not always) be stronger.
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