Question

You need to neutralize a solution of an unknown concentration of sodium hydroxide before you can dispose of it. In the lab, you have a 5.0M bottle of hydrochloric acid, however, you want to dilute that first to use a less concentrated (and less dangerous) solution. So, you decide to use a 0.1M solution of hydrochloric acid solution and to make 2.0 litres of it.

(a) Show all calculations for how you would do this.

(b) Once you have your 0.100M solution of hydrochloric acid, you put 200. mL of your unknown NaOH concentration solution into an Erlenmeyer flask, and titrate. You realize that you needed 500 mL of the 0.100M HCl solution. What was the concentrate of sodium hydroxide solution?

Answer 1

me have 5.OM- Hl (a) Toprepare 0.1M as 2 lit MIVIM2V2 5XVI 01X2 = 0-044 0.04it Hel ard remaining 196tof O-2 watr Profare 0-1M H HIVI(M2 Naoh O.1X500 H2x 200 0X.500 200 2 025M nolarily ef Naot 025M