Define the end point of a titration. Select one: a. It is a synonym for equivalence point. b. It is when a change that indicates equivalence is observed in the analyte solution. c. It is the point at which the pH no longer changes. Next

b. It is when a change that indicates equivalence is observed in the analyte solution.

Explanation:

The end point of a titration is the point at which the indicator undergoes the change noticeable by our senses. Ideally, the equivalence point and end point coincide; but this does not usually happen in practice, because the indicator does not always change perceptibly at the same moment in which the equivalence point is reached and also for the change of the indicator, some of the reagent used in the evaluation is usually necessary .

The difference between the end point and the equivalence point of a valuation is called the valuation error or end point error.

At this point the pH changes the color of the indicator. nvhdurn

idk i’m struggling too

"you start with 15.67 g mgco3-xh2o, when heated and all the water is removed, you are left with 7.58 g mgco3 only.

therefore, you had 15.67 - 7.58 = 8.09g h2o  

moles of each :

7.58g mgco3 = ? moles = 7.58g / 83.4g/mole = 0.09moles  

8 09g h2o = ? moles = 8.09g / 18g/mole = 0.44moles  

molar ratio between the two by dividing both numbers by the smallest number :

0.09 / 0.09 = 1  

0.44 / 0.09 = 4.8  

mgco3-5h2o"