How Do You Calculate the Moles of H₂SO₄ Needed for a Reaction?

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In summary, to calculate the moles of H₂SO₄ needed for a reaction, first identify the balanced chemical equation to determine the stoichiometric relationships between reactants. Next, convert any given quantities (mass, volume, concentration) of H₂SO₄ or other reactants into moles using molar mass or molarity formulas. Finally, use the stoichiometry of the balanced equation to find the required moles of H₂SO₄ based on the moles of other reactants involved in the reaction.
  • #1
Adheesha
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thread moved from technical forum: please ask HW questions in the HW forums, filling the template and showing your work
TL;DR Summary: Question about molarity and concconcentration

25 cm^(3) of NaOH solution with the molarity of 0.1moldm^(-3) Was measured to a pipette and added to a volumetric flask. Then by adding distilled water to the solution, the solution is diluted until the total volume is 250cm^(3) Find the number of moles of H₂SO required to react with 30.0cm(3) of the solution thus made.
 
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  • #2
What is your own attempt?
 
  • #3
Mayhem said:
What is your own attempt?
0.0003 mol
Mayhem said:
What is your own attempt?
 
  • #4
Adheesha said:
TL;DR Summary: Question about molarity and concconcentration

25 cm^(3) of NaOH solution with the molarity of 0.1moldm^(-3) Was measured to a pipette and added to a volumetric flask. Then by adding distilled water to the solution, the solution is diluted until the total volume is 250cm^(3) Find the number of moles of H₂SO required to react with 30.0cm(3) of the solution thus made.
The answer I got is 0.0003 mol.I just wanna know whether it's correct or not cuz I'm not sure about my answer
 
  • #5
Assuming you meant H2SO4 - does it react 1:1 with NaOH?
 
  • #6
Borek said:
Assuming you meant H2SO4 - does it react 1:1 with NaOH?
NO.It reacts 1:2 with NaOH
 
  • #7
Have you accounted for that?
 
  • #8
Borek said:
Assuming you meant H2SO4 - does it react 1:1 with NaOH?
NO.It reacts 1:2 with NaO
Borek said:
Have you accounted for that?
I tried to solve the question and the answer I got was 0.0003 moles.can anybody tell me whether it's correct or not?
 
  • #9
No, it is not correct, and I already pointed you to a reason why it is wrong.

Write reaction equation, calculate number of moles of NaOH, use the stoichiometry to calculate number of moles of H2SO4.
 
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  • #10
Borek said:
No, it is not correct, and I already pointed you to a reason why it is wrong.

Write reaction equation, calculate number of moles of NaOH, use the stoichiometry to calculate number of moles of H2SO4.
Ok thank you
 

FAQ: How Do You Calculate the Moles of H₂SO₄ Needed for a Reaction?

What is the formula to calculate the moles of H₂SO₄ needed for a reaction?

The formula to calculate the moles of H₂SO₄ needed for a reaction is: moles = mass (g) / molar mass (g/mol). The molar mass of H₂SO₄ is approximately 98.08 g/mol.

How do you find the molar mass of H₂SO₄?

The molar mass of H₂SO₄ is found by adding the atomic masses of all the atoms in the molecule: (2 * 1.01) for hydrogen + (1 * 32.07) for sulfur + (4 * 16.00) for oxygen, which equals approximately 98.08 g/mol.

How do you use the balanced chemical equation to determine the moles of H₂SO₄ needed?

First, write and balance the chemical equation for the reaction. Then, use the stoichiometric coefficients from the balanced equation to determine the mole ratio between H₂SO₄ and the other reactants or products. Use this ratio to calculate the moles of H₂SO₄ needed based on the moles of the other substances involved.

How do you convert volume of a solution to moles of H₂SO₄?

To convert the volume of a solution to moles of H₂SO₄, use the molarity (M) of the solution. The formula is: moles = volume (L) * molarity (mol/L). Ensure the volume is in liters before performing the calculation.

What information do you need to calculate the moles of H₂SO₄ required for a reaction?

You need the balanced chemical equation, the mass or volume of the reactants, and the molarity if dealing with a solution. Additionally, you need the molar mass of H₂SO₄ if converting from mass to moles.

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