URGENT! Two chemistry students are preparing for the “Getting the Volume Right” lab challenge. Their goal is to fill a 1000-mL graduated cylinder with CO2 gas from a chemical reaction. They will react with Na2CO3 with an excess of HCl acid to generate the gas. If the temperature on the day of the contest is 19.4oC and the room pressure is 1007 mbar, how many grams of Na2CO3 must they add to the acid to produce the desired volume of CO2 gas? How many moles of HCl will they need?

Answer asap need to be answered by wednesday morning explain how a buffer works, using an ethanoic acid / sodium ethanoate system including how the system resists changes in ph upon addition of a small amount of base and upon addition of a small amount of acid respectively. include the following calculations in your i. calculate the ph of a solution made by mixing 25cm3 0.1m ch3cooh and 40cm3 0.1m ch3coo-na+. [ka = 1.74 x 10-5 m] ii. calculate the ph following the addition of a 10cm3 portion of 0.08 m naoh to 500cm3 of this buffer solution. iii. calculate the ph following the addition of a 10cm3 portion of 0.08 m hcl to 200cm3 of the original buffer solution.