Please help! This is all for one problem so please answer all parts fully. I am

Question

Please help! This is all for one problem so please answer all parts fully. I am at a loss for what to do. Attached are the pages and the table the problem refers to. I am working with Cobalt II pigment

All work must be very neat and organized. 'f your penmanship is poor, you must type all responses. if you need to organize your thoughts pleose use a separate sheet of paper Question 1 (1 p). State the balanced chemical equation for your assigned pigment synthesis. Hint, see page 6 of the Project 5 Guide Question 2 (3 p). Calculate the mass (e) of solid potassium carbonate (K,CO,) needed to prepare 30 ml of a 1.0 M potassium carbonate solution. (This is the 1.0 M K,Co, solution that you will use in your pigment synthesis.) There are several ways to approach this. Perhaps the easiest is to first determine the moles of K,CO, in 30 mL of 1.0 M K CO, solution and then calculate the mass (8) of K,CO, that corresponds to the moles. You may find Toble PS-2 in the Project 5 Guide helpful.

Explanation / Answer

the reaction to produce COCO3 pigment is

CO(NO3)2+ K2CO3------->COCO3 + 2KNO3

1 mole of CO(NO3)2 produces 1 mole of COCO3.

moles of K2CO3= molarity* Volume in L= 1*30/1000=0.03 moles

molar mass of K2CO3= 138.2

mass of K2CO3= moles* molar mass =0.03*138.2 = 4.146 gm

2. mass of pigment = 3 gm, moles of COCO3 pigment = mass/molar mass= 3/118.94 =0.025

1 mole of COCO3 requires 1 mole of CO(NO3)2 as per the reaction

0.025 moles of COCO3 requires 0.025 moles of CO(NO3)2

molar mass of CO(NO3)2= 187.56 g/mol

mass of CO(NO3)2= 0.025*187.56 gm=4.73 gm

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