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Mention the Montreal Protocol that started in 1987 - where all countries signed a treaty thing, to stop using CFCs but rather use replaces such as HFCs and HCFCs

NaOH is a strong base :D

To find if a salt is acidic, basic or neutral you have to look at it. Like CH3COONa Is a basic salt because it contains the conjugate base of a weak acid and a conjugate acid of a strong base :D

How would you answer this oxidation state question ... i kinda don't understand how you do these questions :( Uploaded with ImageShack.us answer is B

how do i answer this question Uploaded with ImageShack.us answer is a

How do you show that Al2O3 is amphoteric ? :)

Is molarity the same as concentration ?

even for B-L base too ?

When showing that an acid is a B-L acid do we always react it with H20 ?

yes KCL is the salt bridge solution

Why is KCl an inappropriate solution to be used in a galvanic cell consisting of copper and silver ?

DO - the level of required for high water quality for aquatic life to respire. BOD - is the amount of DO required by organic matter

Amphiprotic - donate or recieve a proton ie. H20 Amphoteric - it can act as both acid and base HCL ?

Oh i know to prevent loss from the reaction flask

Why do we reflux ?

condenstation polymer reaction with a H20 molecule as its product as well as the polymer itself

If a system is subjected to change it will shift in such a way to counteract that change

To make a buffer we need a weak acid and its conjugate base or a weak base and its conjugate acid

Do not contain a Cl

Screening Aeration Flocculation/coagulation Sedimentation Filtration Chlroination/Flourination