MISSED THIS? Read Section 18.3 (Pages 799 - 802) A 130.0 - mL buffer solution is 0.100 M in NH3 and 0.125 M in NH4Br. Th

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Missed This Read Section 18 3 Pages 799 802 A 130 0 Ml Buffer Solution Is 0 100 M In Nh3 And 0 125 M In Nh4br Th 1 (94.04 KiB) Viewed 35 times

MISSED THIS? Read Section 18.3 (Pages 799 - 802) A 130.0 - mL buffer solution is 0.100 M in NH3 and 0.125 M in NH4Br. The Kb value for NH3 is 1.76 × 10-5 Part A What mass of HCl can this buffer neutralize before the pH falls below 9.00? Express the mass in grams to three significant figures. ▸ View Available Hint(s) m = Templates Symbols undo redo reset keyboard shortcuts help Submit Previous Answers g Constants I Periodic Table x Incorrect; Try Again To solve for the mass of HCl required to bring the pH to 9.00, set up a Henderson-Hasselbalch equation ( pH = pka + log[base]/[acid]). Adding acid will increase the value of the denominator and decrease the value of the numerator in the log fraction. The value of K is given, so you will need to convert the value either to pKb then pKa or to Ka then pKa. You may want to review Hint 1. Calculate the ratio of the buffer required at a pH of 9.00.