Question

HCl(aq)+NaOH(aq)→NaCl(aq)+H2O(l)

A student was given the task of titrating a 20.mL sample of 0.10MHCl(aq) with 0.10MNaOH(aq). The HCl(aq) was placed in an Erlenmeyer flask. An equation for the reaction that occurs during the titration is given above.
How many moles of HCl are in the 20.mL sample of 0.10MHCl(aq)?
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Answer 1

Answer:

student was given the task of titrating a 20.mL sample of 0.10MHCl(aq) with 0.10MNaOH(aq). The HCl(aq) was placed in an Erlenmeyer flask. An equation for the reaction that occurs during the titration is given above.

How many moles of HCl are in the 20.mL sample of 0.10MHCl(aq)

Ok

Answer 2

Final answer: Number moles of $HCl$ are in the $20$ $mL$ sample of $0.10$ $M$ $HCl(aq)$  $\\\\=2\times 10^{-3}$ $mol$

Given that: We are given,

                     $HCl(aq) + NaOH(aq)$ → $NaCl(aq) + H_{2}O(l)$

To find: We have to find the number moles of $HCl$ are in the $20$ $mL$ sample of $0.10$ $M$ $HCl(aq)$.

Explanation:

• The molecular reaction equation:

                 $HCl(aq) + NaOH(aq)$ → $NaCl(aq) + H_{2}O(l)$

• We can calculate number of moles of solute, if we are given molarity of the solution and the volume of the solution in litre.
• Molarity (M) of a solution is defined as the number of moles of solute that dissolved in volume of solution in litre.

              $Molarity, M=\frac{Number of moles of solute}{Volume of the solution in litre}$

• By rearranging the equation:

 $Number of moles of solute= Molarity(M)\times Volume of the solution in litre$

• $Number moles of HCl= Molarity of HCl\times Volume of the solution in litre$

We are given, molarity of $HCl$ = $0.10$ $M$

Volume of $HCl$ = $20$ $mL$ = $0.02$ $L$

Substitute these values,

• Number moles of $HCl$ $=0.10\times 0.02$

                                              $\\\\=2\times 10^{-3}$ $mol$

• Hence, number moles of $HCl$ are in the $20$ $mL$ sample of $0.10$ $M$ $HCl(aq)$  $\\\\=2\times 10^{-3}$ $mol$

To know more about the concept please go through the links

https://brainly.in/question/26223032

https://brainly.in/question/4359511

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