Neutralization Reaction: Volume of NaOH(aq) Needed to Neutralize H3PO4(aq)

  • Thread starter fghtffyrdmns
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In summary: If 1 is NaOH and 2 is H3PO4 then yes. But you should be more specific, as what you have wrote is ambiguous.In summary, to calculate the volume of 0.350 mol/L NaOH(aq) needed to neutralize 54.5 mL of 1.31 mol/L H3PO4(aq), you would write the balanced equation H3PO4 + 3 NaOH -> 3 H2O + Na3PO4 and use the equation c1v1 = 3c2v2, where c1 is the concentration of NaOH, v1 is the volume of NaOH needed, c2 is the concentration of H3PO4, and v2
  • #1
fghtffyrdmns
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Homework Statement



what volume of 0.350 mol/L NaOH(aq) is required to completely neutralize 54.5 mL of 1.31 mol/L H3PO4(aq)?

Homework Equations



c1v1 = c2v2

The Attempt at a Solution



You would just solve for v2 but I am not getting the right answer for some reason.
 
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  • #3
Borek said:
Blindly using equations that don't fit the problem won't get you far.

Have you tried to write reaction equation?

Also, this page may help: http://www.titrations.info/titration-calculation

The equation is wrong?
 
  • #4
Yes, the equation is wrong.

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  • #5
Elaborate.
 
  • #6
No, you follow my earlier advice - write reaction equation & read the page linked to.
 
  • #7
so, 3c1v1 = c2v2

then v1 = c2v2/3c1 ?

This would give me 6.80x10^-2 L.
 
  • #8
You got it reversed.

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  • #10
68 mL is not a correct volume of NaOH.
 
  • #11
Borek said:
68 mL is not a correct volume of NaOH.

Yes, I learned the hard way.

I wrote the balanced equation of H3PO4 + 3 NaOH -> 3 H2O + Na3PO4

3CnaohVnaoh = Ch3po4Vh3po4

Is this wrong?
 
  • #12
Yes, this is wrong. You got it reversed.

How many moles of NaOH needed to react with one mole of H3PO4? What shoudl be multiplied by three - number fo moles of NaOH, or number of moles of H3PO4?

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  • #13
Borek said:
Yes, this is wrong. You got it reversed.

How many moles of NaOH needed to react with one mole of H3PO4? What shoudl be multiplied by three - number fo moles of NaOH, or number of moles of H3PO4?

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www.titrations.info, www.chemistry-quizzes.info, www.ph-meter.info

The H3PO4. This way you would have a 1:1 ration, correct?
 
  • #14
Hard to say what you mean.

Ratio of 1:1 - what to what?
 
  • #15
If you multiply the H3PO4 by 3, you would have a ratio of 1:1 with NaOH:H3PO4.

So you could write c1v1=3c2v2?
 
  • #16
If 1 is NaOH and 2 is H3PO4 then yes. But you should be more specific, as what you have wrote is ambiguous.

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1. What is a neutralization reaction?

A neutralization reaction is a chemical reaction between an acid and a base that results in the formation of water and a salt. This reaction balances out the excess of hydrogen ions from the acid and the excess of hydroxide ions from the base, producing a neutral solution.

2. What are some examples of neutralization reactions?

Examples of neutralization reactions include the reaction between hydrochloric acid and sodium hydroxide, which produces water and sodium chloride (table salt), and the reaction between sulfuric acid and potassium hydroxide, which produces water and potassium sulfate.

3. How do you know if a neutralization reaction has taken place?

A neutralization reaction can be identified by a few key characteristics, including the formation of water and a salt, a change in pH towards neutral (pH of 7), and the release of heat. Additionally, the original acidic and basic properties of the reactants will be neutralized, resulting in a less corrosive and less basic solution.

4. What is the importance of neutralization reactions?

Neutralization reactions have many important applications in various industries, including agriculture, medicine, and manufacturing. They are used to control the pH of soils for optimal plant growth, to neutralize stomach acid in antacids and heartburn medications, and to produce salts for use in fertilizers, detergents, and other products.

5. Can you reverse a neutralization reaction?

Yes, a neutralization reaction can be reversed through a process called hydrolysis. This involves adding water to the salt produced from the neutralization reaction, causing it to break down into its original acid and base components. This process is commonly used in wastewater treatment to neutralize acidic or basic pollutants before they are released into the environment.

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