{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

SCAN0013

# SCAN0013 - Problems 4& 5 show that while a small volume...

This preview shows page 1. Sign up to view the full content.

This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: Problems 4 & 5 show that while a small volume of water will undergo large pH changes upon addition of 0H _ or H 30 +, a properly-prepared buﬂer system of the same volume will undergo much smaller pH changes upon addition of the same amounts ofOH ’ or H 30 J”. Problem 5 will be worked somewhat like Sample Problem 19.] p. 818-9. Problem 6 uses the Henderson-Hasselbalch equation to answer the same questions as in Problem 5. You might ﬁnd the Henderson—Hasselbalch equation easier to use in working buﬂer problems which satisfy the ”5 % ” rule. Use Kw = 1.00 x 10 ‘ ‘4 . \OLC/VSE \WQQ‘ 4a) What is the pH of pure water? VT .. DO MAM Q OVEN "‘ 5) 4b) What is the pH %0 m1 of pure water to which 0.00100 mol of solid NaOH has been added? \1 + ~- ~ ted-:3:- .eotmgg : «01511 M 1011 1901+ «ML 630% whom»: L81"; /pH:\L1¢(1')-»QOH / _. 1 / — \Q\% 5 C) What is the pH of 65.0 ml of pure water to which 0.00100 mol of HCI has been added? HUM \—\2,O-—‘>\—Ke)0* 4 Q0,” XHXY+UK (“30%; :QQA—‘gg—z .Oi'gLEM aOLO 9H: AGEILOXSQB : mad?) (5a) What is e pH ofthe 0.20 M NH3 / 0.20 M NH4C1 buffer system? Kb ofNH3 = 1.8 E — 5. .9M we, cud e QMNUN; CignoM cm NEW“ “to :3- WW t 0H“ 3%: Least 5 x Lawdmﬁ .a—x .Q-HC 5C ﬂ 6329)” . e: [9%6'3’; X 7:: EDA—3 ' : (3H: 0191.0 m ...
View Full Document

{[ snackBarMessage ]}