Qualification > Sciences
CHEM AND BIO HELP AND TIPS HERE
Ghost Of Highbury:
for 4biii)
the reaction
AlCl3 + 3NaOH --> Al(OH)3 + 3NaCl
Al(OH)3 is insoluble (precipitated), however, when all AlCl3 is reacted, the excess NaOH that is added reacts with Al(OH)3
Al(OH)4- ions are formed in the presence of high concentrations of hydroxide: this is soluble. Thus all the precipitate dissolves and the height of the precipitate becomes 0. for the graph, just draw a rough graph where it continues till the maximum point but falles to 0 when excess is added.
Ghost Of Highbury:
hope u understood. :)
$!$RatJumper$!$:
guys whats the formula to calculate percentage yeild?
cooldude:
--- Quote from: $!$RatJumper$!$ on November 11, 2009, 07:23:18 pm ---guys whats the formula to calculate percentage yeild?
--- End quote ---
(actual yield/theoretical yield)*100
~~~~shreyapril~~~~:
enjoyed chem ;)
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