How Do Dalton's Laws Help Calculate HCl Volume Needed in a Chemical Reaction?

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To calculate the volume of HCl needed for the reaction, Dalton's Law can be applied to determine the moles of hydrogen gas produced. The collected gas volume of 428 ml at 20 Celsius and 845 torr must be converted to moles using the ideal gas equation. Once the moles of hydrogen are found, they can be used to calculate the corresponding moles of HCl required. Finally, the volume of the 2.6M HCl solution can be derived from the moles needed. Understanding these steps is crucial for solving the problem effectively.
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Homework Statement


Given the following chemical reaction:
Zn + HCl ----> ZnCl2 + H2(g)

If you measured the total volume of collected gas over water at 20 Celsius to be 428 ml at a total pressure of 845 torr, how many milliliters of 2.6M HCl would be required to produce the correct amount of Hydrogen?

Homework Equations


Dalton's Laws

The Attempt at a Solution


Im not asking for a complete answer here just need help starting, I can't seem to even get how to begin this problem. Any information will be appreciated, thanks.
 
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How many moles of gas were collected?

Can you use this number of moles to calculate moles of HCl necessary? Then volume of solution that contains these moles?
 
How can i find out how many moles I collected if i wasnt even given how many i started of with. I am sorry to sound dumb but I am having a difficult with this. It might be that I am just missing something really small.
 
You are missing something something really big. It is called ideal gas equation.
 
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