Question

JUILLS alcalUWCU. FUUWI LLUCOCUIDLUI d luck! Question 21 ***A 50 mL solution of 0.10 MHC2H302 (aq) (K = 1.8 x 10-5) is titrated with 0.20 MNaOH (aq). ** What is the pH when 30 mL of NaOH(aq) is added? O 11.23 O 1.90 O 8.98 12.10 O 12.90 Prevus Quiz saved at 1:55pm

Answer 1

dus) atha caa) H HO (aq) + et Natur NaOH(ac) NaC, H, O₂ (ar) + H₂O stepſ. find moles of Xaco Moz formed. al males of Cathole a males of NaOH) x 1 male of lang imale of Nach [ Moles & Molarity & volume 7 Put values. moles of 690,- (0.9 M X 30 X10%L) X! 2 6x10-3 mas

6) malce of C2 H₂O =/moles of H C N O 2 ) x (male Ghos I mole of Hisho, 2 (Molority & voleume) x 1 9 50 X10-3L XOolm - 5 X10mal so. Ha hele acts as luniting Reagent. HUUUUUUUUUUUUUUUUU c) find Remaning make of noon. Remaning moles of NaOna initial males - molis of 5 Naon used s 10 moles of Naon used moles of HGH OR X Imole non Imole nanes - 50x10" L XOOM - SX10-3 mol Remaning moles of Noon = 0.2 MX 30x10 - Sxrose = 6X10-3 mol-5x10 me IN има и m L 1810 mol

- d) find molarity of Naon. Total volume & ome + 30ml - Come. Molarity – moles Total volume of Sale in L Molaruty = 1x10-3 mol al & 0 od 25 M. 804102 - ОИ e) find le of solution. Pin - 14. Pon. (Pon= - Lag [on]] Pue 14 - (- Log Con la 14 - (- log (0.0125) Pn - 14 - 1.90 > 12./ P = 12.90 du Thank you)