How many grams of NaHCO3 must be added to 4.0g of K2CO3 to give a pH of 10.80 in 500mL of water?

After watching the video "zinc strip in copper nitrate solution", and reading the instructions, click on the link labeled "start" just below the drawing of the pencil tip. follow the direction to complete the 3x3 grid. answer the below questions for the portion of the activity in which sn(s) is placed in agno3(aq)