Question

8. Find the new molarity if the following are di viarity in the following are diluted with water to 2.00L. 550.mL of 0.269M K2SO4. b. 1.22L of 2.16 M NaOH. mob 02 9. How many mL of concentrated solution are required to dilute: a. 18M H2SO4 to 350mL of 5.0MH2SO4. Stalo to ! b. 0.735M NH4OH to 275mL of 0.200 M NH4OH. 1oz 10. How many mL water must be added to produce to their a. 625 mL of 1.00M solution from 6.00M solution? moto b. 2.5L of 0.250M solution from 0.450M solution? 102

Answer 1

: (8) (a) wew molacity dole fate to 2.002 ditution equation Mavo= Harz 0.550 LX0.269 N = M2 X 2L TH=0.0744 New molality=0.07um 1) Meria M2 Vz 1.222 X 2.162 M2 X 2L H2= 1.3176m New molality = 1.3176M (9) concentection solution required (a) Merea MaV2 If x V) - 0. 30 x 5 Vi=0.09722 Ve= 97.22 ML volume of concentеatial solution required a 97-22ml (6) Meria M2 V2 0.735m x V = 275mc 40-20m Ve= 74.83 m2 Tvolume required a 74.38ml

1) (a) water to be added is vml Merea M₂ V2 628m. x 1.00h = 6MXV Tue 104.167 mL) Water to be added = 104.167mL b) 0.450 X V = 2.54 X0.250 V= 1.3892 Watu to beaded = 13892