Question

Four SFS Thre Concentr decreas When the final volu (concentration factor volume (V) as predic STUDY CHECK 9.13 What initial volume of a 3.0% (m/v) mannose sol TEST Try Practice Problems 9.57 to 9.62|| ANSWER 25 mL of a 15% (m/v) PRACTICE PROBLEMS -5 Dilution of Solutions EARNING GOAL Describe the dilution of a solution; calculate the known concentration or volume when a solution is diluted. 55 Calculate the final concentration of each of the following: a. 2.0 L of a 6.0 M HCl solution is added to water so that the final volume is 6.0 L. b. Water is added to 0.50 L of a 12 M NaOH solution to make 3.0 L of a diluted NaOH solution. c. A 10.0-mL sample of a 25% (m/v) KOH solution is diluted with water so that the final volume is 100.0 mL. d. A 50.0-mL sample of a 15% (m/v) H2SO4 solution is added to water to give a final volume of 250 mL.

Answer 1

M,-iteal laity M, fral elanity inital volume M V a)Apply MV hare, M, 6.0M HCL we 2-0L fual volume 2 OL M,V,MV Now, 6.0M X 2 02 - 2:0 M MIVI M2 = OY Thus, fnal concentraton 2.0 M

have, M i = 12 M b) We 0.50L V2 = 3.0L M,VIM2V Now 12 мхо50 M,VI M2 2.0M 3 01 V Thur, fmal concentraton 2.0M

lnde 25% (nN) duton ueans, selution. so, 251 0.0mL= tute in nas x 1oOmL ma Ueluwe l0omL Now, fal concentraten () percentage 251x/007 2:5.(mh) d) IS n/) means, д x SoomL olute m SoOmL Mars 7.59 fnaleluwe = 2S0mL 7.59 Now,fmal concentraton 2 SO mL 30 ()