CW 13(1) - CHM 2046 Worksheet 13 1 Give the net ionic...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Background image of page 2
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: CHM 2046 Worksheet 13 1. Give the net ionic equation for the principal (large shift right) reaction occurring when these are mixed. NAR = no appreciable reaction is a possible answer. (a) NaH2P04(aq) and NH4Ac(aq) Iva“) H190; M447 A0. (c) NaH2P04(aq) and NaHSO4 (an , pm) H50; . H512,” + HR P0; —-) . €po 4. H3 pg; (1;) NaH2P04(aq) and NaOH(aq) (excess) ‘ . M5") DH’ Haqu” + 2— UH~ fi {301;} + a gag, . (9’) NaH2PO4(aq) and NH3(aq) (excess) HaPLlf Jr mt. a HPf‘ + w 2. A solution is both 0.10 M NH3 and 0.20 M NH4C1. The concentrations are: [NH3] = M [NH4+] = [CI-1 = 0. MM What is the pH of this buffer? ' (QM c Xec/é: _ pH 4 p k4, P l‘l :: v ’05 (676 A ’0 w) "' )05 0 ,m) {Di/e [ML] >fcgJ 4— 0‘— pH= 3. A solution is prepared by mixing 200. mL of 0.40 M NH3 and 100. mL of 0.30 M NH4C1. Now what are the principal specie~concentrations. (There is no reaction here, but each solution dilutes the other.) f”%3=“l”02¥%? Lfli cw a? M . C NW3=VV3 ‘ 03cm (gm [NH3] =M [NH4+] = [c1-] = Whatis the pH of this buffer? ' M pH 7 Fiat 0.!0 5W — __.. ._____ . ch3< [ 4'3 pa.qa5' n(wJ? 1* 3 2am} @1459 4. A solution is prepared by mixing 400. mL of 0.10 M NaOH and 100. mL of 0.50 M NH4C1. (a) What concentrations would exist after mixing but before any reaction? : on-j ; (2:29 WW} : Dr 1 e WW (2231) [Na+] = [OH‘] = 019%01‘12 [NH4+]=[C1']= 9‘ 10M (b) What appreciable concentrations will exist gfler reaction 19 completion? OH- + NH4+ —> H20 + NH 0 m 03 x : a 080 . V 0 __ j; 00s [X / H We} M 0291 I § AW ,’ a” L 0 0,03 0, mm 5 [Na+] = 0 ( 0%0M [01-]: 0 i [U M Mikw m3]: 0. m M What is the pH of this final solution? Nah, we how-C q (NAM—#4” NHS); Tim's WWHL aft/may; 5a 7419/ [45%. If. ‘L’Wf; 0% WAIQA V¢%7[M7L {g )q‘m,‘ {‘1‘th a? Qezagm‘ah’g w/m‘zl 7‘ 4a 0 519L47Lr‘91’l WW km (54/ wA/ eugm) we) ,1, 9; 95 pava 03C +fxe/ [)VoL/W. ...
View Full Document

This note was uploaded on 02/14/2012 for the course CHM 2046 taught by Professor Veige/martin during the Spring '07 term at University of Florida.

Page1 / 2

CW 13(1) - CHM 2046 Worksheet 13 1 Give the net ionic...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online