Briefly explain the following terms as they relate to this experiment: a. end po

Question

Briefly explain the following terms as they relate to this experiment: a. end point b. standard solution c. phenolphthalein The molar concentration of a sample of hydrochloric acid (HCI) was studies by titration with standard 0.600 M NaOH. The following information was collected in the experiment. Completer the remainder of the data table. The difference between final and initial readings of a indicates the volume of NaOH used. From the procedure, write the balanced chemical equation for the neutralization reaction you will be performing in lab (NOT from #2).

Explanation / Answer

Answer (1)

(A) Endpoint

end point is the point during a titration when an indicator shows that the amount of reactant necessary for a complete reaction has been added to a solution.

(B) Standard Solution

Standard solutions are solutions with a known concentration of a substance. They're used in chemistry, particularly analytical chemistry, to help identify or determine the concentration of unknown substances. Primary standards are often used when preparing standard solutions.

(C) phenolphthalein

Phenolphthalein is a colourless, weak acid which dissociates in water forming pink anions. Under acidic conditions, the equilibrium is to the left,and the concentration of the anions is too low for the pink colour to be observed. However, under alkaline conditions, the equilibrium is to the right, and the concentration of the anion becomes sufficient for the pink colour to be observed.

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