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This is TBR gen chem I p.330 #54:
How many mL of 0.4M H2SO4(aq) would require the same amount of base to reach full neutralization as would 25mL 0.6M H3PO4?
A. 25.00mL 0.4M H2SO4
B. 37.50mL 0.4M H2SO4
C. 50.00mL 0.4M H2SO4
D. 56.25mL 0.4M H2SO4
So I kind of understand the calculations, although if someone could go over that explaining the concepts I would appreciate it. My main question is on the explanation given for the answer: "Sulfuric acid has only 2 acidic protons, whereas phosphoric acid has three acidic protons to neutralize. Thus, phosphoric acid requires only two-thirds the amount of base that is required for sulfuric acid."
Why does it require only two-thirds? I figured since phosphoric acid has more protons to neutralize, it would need more base?
This is TBR gen chem I p.330 #56:
What is the phosphate cocnentration in Flask 2 after 40 mL of 0.30N NaOH has been added?
A. 0.050M PO4
B. 0.100M PO4
C. 0.450M PO4
D. 0.900M PO4
How would you calculate this? It seems like to me that the back of the book just randomly switches from normality to molarity. If someone could explain the calculations and concepts, I'd appreciate it!
How many mL of 0.4M H2SO4(aq) would require the same amount of base to reach full neutralization as would 25mL 0.6M H3PO4?
A. 25.00mL 0.4M H2SO4
B. 37.50mL 0.4M H2SO4
C. 50.00mL 0.4M H2SO4
D. 56.25mL 0.4M H2SO4
So I kind of understand the calculations, although if someone could go over that explaining the concepts I would appreciate it. My main question is on the explanation given for the answer: "Sulfuric acid has only 2 acidic protons, whereas phosphoric acid has three acidic protons to neutralize. Thus, phosphoric acid requires only two-thirds the amount of base that is required for sulfuric acid."
Why does it require only two-thirds? I figured since phosphoric acid has more protons to neutralize, it would need more base?
This is TBR gen chem I p.330 #56:
What is the phosphate cocnentration in Flask 2 after 40 mL of 0.30N NaOH has been added?
A. 0.050M PO4
B. 0.100M PO4
C. 0.450M PO4
D. 0.900M PO4
How would you calculate this? It seems like to me that the back of the book just randomly switches from normality to molarity. If someone could explain the calculations and concepts, I'd appreciate it!