1. Justify the purpose of the following in this experiment: a. using concentrate

Question

1. Justify the purpose of the following in this experiment: a. using concentrated (and not dilute) sulfuric acid b. adding excess acetic acid c. extracting with sodium bicarbonate (step 5) d. extracting with water after extracting with sodium bicarbonate (step ) e. using magnesium sulfate (step 7). 2. Would the reaction work if concentrated hydrochloric acid was used 3. Why wouldn't concentrated sodium hydroxide (instead of sulfuric acid) 4. Give the structure of the product in the reaction belo instead of sulfuric acid? give good results?

Explanation / Answer

Q1

a)

concentrated sulfuric acid is required in order to favour metals dissolution, diluted acid will not work

b)

excess acetic acid ensures plenty of acid , H+ protons, and will not be the limitng reactant

c)

sodium bicarbonate is needed, since it is a mild base, will not be "aggressive" or very reactive towards materials, ideal for exctractions in basic media

d)

water will obtain all "ionic" material from the bcarbonate exctracted material

e)

magnesium sulfate is used to dissicate mateiral, also, it will favour ionic strnegth in solution

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