Question

You want to make 500 mL of 10 M NaOH solutions? How much NaOH do you have to weigh out? Walk me through the steps it takes to make this solution? During the weighing out process you weigh out 201.53 NaOH, what is your new molarity? Using your stock solution, you want to make a series of dilutions, you want 25 mL of the following concentrations of NaOH: 0.5 M ,1 M, 3 M, 7 M, 9 M. How much stock will you need for each?

Answer 1

Question: Answer a Melecular weight g NaOH = 40 To make IM NaOH solution require 40 gon/ To make 674 500 ml q im NaOH S04" req. 2001 for make soomL q 10m plach height of NaoH for 100 = 8 ? 10x20 200 To make 500ML q Som NaOH solution require oog 8 NaOH. Answer 2 : The steps given below. . To make 10 M NaOH sotution in 500ml o eigh out 200 g galacto Transfer it into the 500 mL meas o then slowly add water, initially heat is evolved will leads to healing, g water Allow to cooldown the solution then add semaining solution and analsety up to sooml, gwater, easuring cylender. Answer 3: Molanity = weight 500mL = I liter Molecular weight x goomt IL 2 201.53 40 x =10.07 M solution of NaOH) NaOH is 10.07 M Molarity 8

f of Answer 4:- Griven Molarity NaOH = M = 10.07M MiVi= M₂ V2 Volume Naon = vi=& Total volune 2=25mL for making 0.5M solution Viz 0.5XQ5 ml 10.07 = 1.25 ML To make 0.5m NaOH require 1.25 ml 10.07 M algoH. of For IM solution N = 1 x25 10.07 = 2.5mL 3X25 for 3 m - solution. N, 27.44 ML 10.07 For BA NGOH rep. 7.44 m2 To make IM NaOH rep. 2.5m For FM solution For gm solution. = 7 825 = 17-37 m2 Viz 9825 10.07 222-34 ML 10.07 To make 7m NaOH solution from 10.07M 30th grequire 17037 ml To make 3M NaOH rep. 2234 L

Questen 5: NaOH + HCl > NaCl + H₂O Acid= proton / H+ donor Base = profon Ht acceptor The reaction given below H-ei + Na-OH OH caps Nater + H₂O cogs acid. In above reaction • HCl donate proton honce it is Bronsted-Lowry o Naoh accept proton and it is Bransted- Lowry base. Question 6:- The reaction below 7 Solla with Na₂504 given Srcle + Na₂SO4 >QNaCl + Srson The net imic equation given below Sotte at Sr + 2Cl. + 2Nat + sohcaq capst caq? Srso tinate caps caps +2 et cap