Question

Assignment/takeCovalentActivity.do locator assignment take (References) An 18.6 mL volume of hydrochloric acid reacts completely with a solid sample of MgCO,. The reaction is 2HCl(aq) + MgCO3(s) + CO2(g) + H20(1) + MgCl, (aq) The volume of CO2 formed is 135 mL at 23°C and 731 mmHg. What is the molarity of the HCl solution? Molarity = Submit Answer Try Another Version 3 item attempts remaining

Answer 1

from the data CO formed is Volume (V) = 135me, = 0.135L Temperature (T) = 23°C 23+273 = 296K Pressure (P) = 731 mmHg we know 760 mmHg = hatm bommHg X73) Holes) P=0.962a+m From Ideal gas equation PV = nRT na PV R = gas constant = 0.0821 L. atmik.mol substitute all the values in n=PV/Rt equation ne 0.962 atm) (0.135L) Co.o8al 2.atm) (2964) mol 24.2016 n = o oo 534 p. : 0.00534 mol of co is prodlied · Scanned with CamScanner

From the balanced equation & HCl (99) + Mg CO2 (s) + CQ (9) + HO(8) + Mgal (21) a mole Hel Then ? produce Hol 1 mol ca 0.00534 mol com 2 mol HCl Imol con X 6: 00 534 mol Co, = 0-0|o68 mc| H| .' 0.0 1068 Mol of HCl reacted. MCI Volume = 18.6 me = 18.6x103 L Concentration = number of moles Volume (in L) M = 0.01068 mol 18.6 x 16-3, 78.7 M → Concentration of HCl = 0.574 M Molarity of HCl = 0.574M = 0.57 M Scanned with CamScanner