Crystallization is a physical change from liquid form to solid form. It is the opposite of melting. This is done by creating a supersaturated solution. You add more solute exceeding its capacity and heat so that all will dissolve. Then, when you cool it down with an aid of the ice, solid crystals will eventually form. The bigger the container the ice, the faster is the rate of crystallization and the bigger the solid crystals would be.
Concentrated phosphoric acid is added to the reaction mixture in the synthesis of aspirin to maintain the acidic environment and to keep the reagents protonated.
<h3>What is the phosphoric acid?</h3>
Phosphoric acid is an inorganic acid with the molecular H₃PO₄.
Its a triprotic acid which means that one molecule of the acid produces 3 molecules of hydrogen ions.
Phosphoric acid is important for many laboratory as well as industrial uses. It can be serve as buffer in living organisms.
It also used in the synthesis of aspirin.
The synthesis of aspirin requires an acidic environment. Therefore, concentrated phosphoric acid is added to the reaction mixture in the synthesis of aspirin to maintain the acidic environment and to keep the reagents protonated.
In conclusion, Phosphoric acid ensures an acidic environment in the synthesis of aspirin.
Learn more about phosphoric acid at: brainly.com/question/8031899
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The density of the gold is 19.3 grams/cc so each cc weighs 19.3grams. Now we can obtain the volume of gold from the given dimensions ie 4.72x8.21x3.98= 154.23 cc. So for the answer, just multiply the volume or 154.23 x 19.3= 2976.6 grams is the answer.
D is true because NO2 is a catalyst, and a catalyst is a compound which makes a reaction occur faster (not necessarily more effectively, creating more product, but it decreases the amount of time it takes).
They are classified as Decomposers
