Reacting Zn with .248M HCl to Produce H2

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In summary, the purpose of reacting Zn with .248M HCl is to produce hydrogen gas (H2) and zinc chloride (ZnCl2) to demonstrate the reactivity of metals with acids. The chemical equation for this reaction is Zn + 2HCl → ZnCl2 + H2. The concentration of HCl affects the rate of the reaction, with a higher concentration resulting in a faster reaction. Safety precautions such as wearing gloves and safety glasses, working in a well-ventilated area, and properly disposing of chemicals should be taken when performing this experiment. Possible sources of error include inaccurate measurements, impurities in the chemicals, inadequate stirring, and loss of hydrogen gas during transfer. It is important to
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How many milliters of .248 M HCl are needed to react with 1.36g of zinc to produce hydrogen gas
 
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To determine the amount of HCl needed to react with 1.36g of zinc, we can use the balanced chemical equation for the reaction:

Zn + 2HCl → ZnCl2 + H2

From the equation, we can see that 1 mole of zinc reacts with 2 moles of HCl to produce 1 mole of hydrogen gas. Therefore, we need to calculate the moles of zinc in 1.36g.

1.36g of Zn x 1 mol Zn/65.38g Zn = 0.0208 mol Zn

Since the ratio of zinc to HCl is 1:2, we need twice the amount of HCl in moles.

0.0208 mol Zn x 2 mol HCl/1 mol Zn = 0.0416 mol HCl

Now, we can use the molarity formula to calculate the volume of 0.248 M HCl needed.

Molarity = moles of solute/ volume of solution

0.248 M = 0.0416 mol HCl/ volume of solution

Volume of solution = 0.0416 mol HCl/0.248 M = 0.1678 L

Since 1 L = 1000 mL, the volume of 0.248 M HCl needed is 167.8 mL. Therefore, 167.8 mL of 0.248 M HCl is needed to react with 1.36g of zinc and produce hydrogen gas.
 

1. What is the purpose of reacting Zn with .248M HCl?

The purpose of reacting Zn with .248M HCl is to produce hydrogen gas (H2) and zinc chloride (ZnCl2). This is a common experiment used in chemistry to demonstrate the reactivity of metals with acids.

2. What is the chemical equation for the reaction between Zn and .248M HCl?

The chemical equation for this reaction is:
Zn + 2HCl → ZnCl2 + H2

3. How does the concentration of HCl affect the reaction with Zn?

The concentration of HCl affects the rate of the reaction. A higher concentration of HCl will result in a faster reaction, as there are more acid molecules available to react with the zinc. However, the overall products of the reaction will remain the same.

4. What safety precautions should be taken when performing this experiment?

When performing this experiment, it is important to wear gloves and safety glasses to protect against any potential splashes of acid. The experiment should also be conducted in a well-ventilated area to avoid inhaling any fumes. Proper disposal of the chemicals used is also important.

5. What are some possible sources of error in this experiment?

Possible sources of error in this experiment include not measuring the quantities of reactants accurately, incomplete reaction due to impurities in the chemicals or inadequate stirring, or loss of hydrogen gas during the transfer process. It is important to carefully follow the experimental procedure and take multiple measurements to reduce the potential for error.

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