You are instructed to create 200. mL of a 0.63 M phosphate buffer with a pH of 6.0. You have phosphoric acid and the sodium salts NaH2PO4, Na2HPO4, and Na3PO4 available. (Enter all numerical answers to three significant figures.)
H3PO4(s) + H2O(l) equilibrium reaction arrow H3O+(aq) + H2PO4â(aq) Ka1 = 6.9âââ10â3
H2PO4â(aq) + H2O(l) equilibrium reaction arrow H3O+(aq) + HPO42â(aq) Ka2 = 6.2âââ10â8
HPO42â(aq) + H2O(l) equilibrium reaction arrow H3O+(aq) + PO43â(aq) Ka3 = 4.8âââ10â13
What is the molarity needed for the acid component of the buffer? 0.593
What is the molarity needed for the base component of the buffer? 0.0371
How many moles of acid are needed for the buffer?
How many moles of base are needed for the buffer? 0.00741
How many grams of acid are needed for the buffer?
How many grams of base are needed for the buffer?
You are instructed to create 200. mL of a 0.63 M phosphate buffer with a pH of 6.0. You have phosphoric acid and the sodium salts NaH2PO4, Na2HPO4, and Na3PO4 available. (Enter all numerical answers to three significant figures.)
H3PO4(s) + H2O(l) equilibrium reaction arrow H3O+(aq) + H2PO4â(aq) Ka1 = 6.9âââ10â3
H2PO4â(aq) + H2O(l) equilibrium reaction arrow H3O+(aq) + HPO42â(aq) Ka2 = 6.2âââ10â8
HPO42â(aq) + H2O(l) equilibrium reaction arrow H3O+(aq) + PO43â(aq) Ka3 = 4.8âââ10â13
What is the molarity needed for the acid component of the buffer? 0.593
What is the molarity needed for the base component of the buffer? 0.0371
How many moles of acid are needed for the buffer?
How many moles of base are needed for the buffer? 0.00741
How many grams of acid are needed for the buffer?
How many grams of base are needed for the buffer?
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