3- a) What is the molarity of the solution containing 12mg of CH3COOH per mL ? (MCH3COOH: 60 g/mol) ) (Answer: M:0.2mol/L) b) The concentration of concentrated H2SO4 solution containing 98% by weight of H2SO4 is 1.84g / mL. How many mL should I take to prepare 1 liter of 0.1N solution from this solution? (Answer: v : 2.72mL to 1 litre) 4- NiINi2+ (? M) II Cu2+(0.75M) I Cu Ecell: 0.601V. What is Ni2+ concentration (mol/L) ? (Please, write half cell reactions) (E0Ni/Ni2+:+0.25VEE0Cu2+/Cu:0.34V ) (Answer: M:0.26mol/L ) 5-How can you prepare 100mL6MHCl from 37%HCl (d: 1.18kg/L) ? (MHCl:36.5g/mol ) (Answer: V : 50.16mL to 100mL )