A student performs a titration procedure by adding NaOH to a solution that contains H+ ions. She added the indicator, phenolphthalein, to the flask containing the H+ ions. What was the purpose of adding the indicator to the flask?

A. The indicator adds more H+ ions to the solution which allows the titration procedure to proceed faster.

B. The indicator is expected to turn pink when the end point of the neutralization reaction occurs.

C. The indicator was used to determine when the amount of H+ ions was greater than the concentration of OH- ions.

D. Because the indicator has the same pH as the NaOH, it is used to determine the pH of the titrant.

Question

HerGardenofEden HerGardenofEden

06-06-2017
Chemistry

contestada

A student performs a titration procedure by adding NaOH to a solution that contains H+ ions. She added the indicator, phenolphthalein, to the flask containing the H+ ions. What was the purpose of adding the indicator to the flask?

A. The indicator adds more H+ ions to the solution which allows the titration procedure to proceed faster.

B. The indicator is expected to turn pink when the end point of the neutralization reaction occurs.

C. The indicator was used to determine when the amount of H+ ions was greater than the concentration of OH- ions.

D. Because the indicator has the same pH as the NaOH, it is used to determine the pH of the titrant.

Respuesta :

Otras preguntas

integral of 7xe^3xdx using integration by parts

Employer rights include what

relationship between ordinal position and academic achievement among adolescents: a study-State the results/conclusions of this study.

what do you think would todd's prespective be on his having borrowed the dollar?

1A ✓ 1B ✓ The table shows information about the masses of some dogs. < Previous a) Work out the minimum number of dogs that could have a mass of more than 27

An object is traveling in a straight line. Its acceleration is given by : a = Ctn where C is a constant, n is a real number, and t is time. Find the general equ

Si cada uno de los cables puede soportar una tensión máxima de 455 N, determine la masa máxima del cilindro para que se pueda mantener el equilibrio. Siendo las

Total assets 12/31/22. 405,000 Total liability, 12/31/22. 295,000 Paid-in capital 12/31/22. 42,000 Retained earnings 12/31/22 ? Net income for 2022 ? Dividends

Give 3 functions of the ribs.

Plagiarism cannot be committed through electronic formats. True False

Erudite1 Erudite1 · Answer 1 · 2017-06-12T18:57:30+02:00

Indicators are substances that produce colour changes to indicate the presence or absence of a threshold concentration of a particular chemical specie. In neutralization reaction, indicators produce colour changes on the basis of the pH of the solution. In acid base titration, indicators are used to indicate the end point of the neutralization reaction. The end point of acid base titration is the equivalence point when the moles of the of the standard solution is equal to the moles of the unknown solution. Thus, the correct option is B. Note that the solution that contain the H+ ions is the acid.