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

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To calculate the moles of H₂SO₄ needed for a reaction with NaOH, one must consider the stoichiometry of the reaction, which is 1:2. A user attempted to find the moles based on a diluted NaOH solution but arrived at an incorrect answer of 0.0003 mol. The correct approach involves writing the reaction equation, calculating the moles of NaOH from the given concentration and volume, and then using stoichiometry to determine the moles of H₂SO₄ required. The discussion emphasizes the importance of proper calculations and understanding reaction ratios. Accurate calculations are crucial for determining the correct amount of reactants needed.
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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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What is your own attempt?
 
Mayhem said:
What is your own attempt?
0.0003 mol
Mayhem said:
What is your own attempt?
 
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
 
Assuming you meant H2SO4 - does it react 1:1 with NaOH?
 
Borek said:
Assuming you meant H2SO4 - does it react 1:1 with NaOH?
NO.It reacts 1:2 with NaOH
 
Have you accounted for that?
 
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?
 
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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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
 

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