Answer:
The pH at the equivalence point is lower than 7
Explanation:
Given the titration involves a strong acid and a weak base
An example is the reaction between ammonia and hydrochloric acid in the aqueous phase
The pH of the base will ordinarily start high and drop rapidly with the additions of acid. As the equivalence point is approached, the pH will change more gradually, until finally one drop will cause a rapid pH transition through the equivalence point.
If a chemical indicator is used—methyl orange would be a good choice in this case—it changes from its basic to its acidic colour.
In strong acid-weak base titrations, the pH at the equivalence point is not 7 but below it. This is due to the production of a conjugate acid during the titration; it will react with water to produce hydronium ions.
6.6 g
Explanation:
The mole ration between CaCO₃and CO₂ is 1 : 1
Because the molar mass of CaCO₃ is 100.0869 g/mol the amount of moles used in this chemical reaction is;
15/ 100
This will be similar to the moles of CO₂
Because the molar mass of CO₂ is 44g, then well multiply by the moles;
15/100 * 44
= 6.6 g
Answer:
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