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11 Dec 2019

A 33.00 mL sample of an unknown H3PO4solution is titrated with a 0.110 M NaOH solution. The equivalence point is reached when 26.03 mLof NaOH solution is added.

Part A

What is the concentration of the unknown H3PO4 solution? The neutralization reaction is

H3PO4(aq)+3NaOH(aq)→3H2O(l)+Na3PO4(aq)

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Bunny Greenfelder
Bunny GreenfelderLv2
13 Dec 2019

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Related questions

When 20.0 mL of 1.0 M H3PO4 is added to 60.0 mL of 1.0 M NaOH at 25.0 degrees celcius in a calorimeter, the temperature of the aqueous solution increases to 35.0 degrees celcius.

Assuming that the specific heat of the solution is 4.18 J/(g⋠∘C), that its density is 1.00 g/mL, and that the calorimeter itself absorbs a negligible amount of heat, calculate ΔH in kilojoules/mol H3PO4 for the reaction.

H3PO4(aq)+3NaOH(aq)→3H2O(l)+Na3PO4(aq)

1) A 24.00 −mL sample of an unknown HClO4 solution requires titration with 22.82 mL of 0.1900 M NaOH to reach the equivalence point.
What is the concentration of the unknown HClO4 solution? The neutralization reaction is:
HClO4(aq)+NaOH(aq)→H2O(l)+NaClO4(aq)

2) A 25.00 mL sample of an unknown H3PO4 solution is titrated with a 0.100 M NaOH solution. The equivalence point is reached when 26.33 mL of NaOH solution is added.
What is the concentration of the unknown H3PO4 solution?

3) An acid solution is 0.100 M in HCl and 0.200 M in H2SO4.
What volume of a 0.140 M KOH solution would have to be added to 550.0 mL of the acidic solution to neutralize completely all of the acid?

4) A tanker truck carrying 2.01×103 kg of concentrated sulfuric acid solution tips over and spills its load. The sulfuric acid solution is 95.0% H2SO4 by mass and has a density of 1.84 g/mL.
Sodium carbonate (Na2CO3) is used to neutralize the sulfuric acid spill. How many kilograms of sodium carbonate must be added to neutralize 2.01×103 kg of sulfuric acid solution?

A 22.00 −mL sample of an unknown HClO4solution requires titration with 21.62 mL of 0.1900 M NaOH to reach the equivalence point

What is the concentration of the unknown HClO4 solution? The neutralization reaction is:
HClO4(aq)+NaOH(aq)→H2O(l)+NaClO4(aq)

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