Answer to Question #167348 in General Chemistry for Vikas

Question

During a lab, students are asked to titrate 90.mL of 0.60M weak base NH3(Kh=1.8 x 10^-5) with 1.0M Hal. Calculate the pH at each the different points in the titration shown below:

a. Initial starting point(0mL of titrant)

b. 10mL of titrant (HCl) is added

c. 27mL of titrant

d. 41mL of titrant

e. 54mL of titrant

f. 70mL of titrant

g. Sketch the titration curve using proper scales and with appropriate labels (axis, legend, equivalency point, 1/2 way point to equivalency point).

Answer 1

a. Initial starting point(0mL of titrant)- 3

b. 10mL of titrant (HCl) is added - 5

c. 27mL of titrant-5.6

d. 41mL of titrant-6.2

e. 54mL of titrant-5.8

f. 70mL of titrant-3.4