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eduard
3 years ago
10

For the reaction, calculate how many moles of the product form when 2.73 mol of h2 completely reacts. assume that there is more

than enough of the other reactant. h2(g)+cl2(g)→2hcl(g)
Chemistry
2 answers:
blagie [28]3 years ago
6 0

Answer:

5.46molHCl

Explanation:

Hello,

In this case, as both of the reactants are completely consumed, one infers that the following stoichiometric relationship leads to the produced moles of the product; hydrochloric acid:

2.73molH_2*\frac{2molHCl}{1molH_2}=5.46molHCl

It is important to notice that based on the undergoing chemical reaction, 1 mole of hydrogen is related with 2 moles of hydrochloric acid, that is why he product's moles doubles the hydrogen's moles.

Best regards.

Arte-miy333 [17]3 years ago
3 0

For the calculation of number of moles of HCl that is produced by 2.73 moles of H₂.

Considering the reaction shown below:

H₂ + Cl₂------->2HCl

This can be seen from the reaction that 1 mole of H₂ produce=2 mole of HCl

So , 2.73 mole of H_{2} will produce= 2.73\times 2 mole of HCl

That is 2.73 mole of H_{2} will produce= 5.46 mole of HCl

So 5.46 mole of HCl will be produced by 2.73 mole of H_{2}


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4. A 0.51 kg solution contains 87 mg of potassium iodide. Calculate the W/W concentration
anzhelika [568]

Taking into account the definition of percentage composition, the percent composition of potassium iodide in this sample is 0.017%.

<h3>Definition of percent composition </h3>

The Percentage Composition is a measure of the amount of mass that an element occupies in a compound and indicates the percentage by mass of each element that is part of a compound.

To calculate the percentage of composition, it is necessary to know the mass of the element in a known mass of the compound.

<h3>Percentage Composition in this case</h3>

In this case, you know that a 0.51 kg (or 510000 mg, being 1 kg= 1000000 mg) solution contains 87 mg of potassium iodide.

Dividing the mass amount of potassium iodide present in the compound by the mass of the sample and multiplying it by 100 to obtain a percentage value, the percentage composition of potassium iodide is obtained:

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Finally, the percent composition of potassium iodide in this sample is 0.017%.

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What is the poH of a<br> 2.6 x 10-6 M H+ solution?
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pH and pOH.....

The pH is a way of expressing the hydrogen ion concentration.

pH = -log[H+] ............. where [x] means "the concentration of x in moles per liter."

From pH you can compute pOH since at 25C pH + pOH = 14.00 .......... (but only at 25C)

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When taking the log of a number, only the digits to the right of the decimal reflect the precision in the original number. Since 2.6x10^-6 has two significant digits, a pH of 5.59 has two significant digits.

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We can also use the H+ ion concentration to get the hydroxide ion concentration and from that the pOH.

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=========

Just for grins, you might want to know how Kw changes with temperature, and how [H+] and [OH-] are related at some other temperatures. The pH is the pH of a neutral solution at various temperatures. For instance at 10C a neutral solution has a pH of 7.27. That's not a basic pH. 7.27 is the pH of a neutral solution, but at a different temperature. In a neutral solution at 10C [H+] = [OH-] = 5.41x10^-8M.

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40....... 6.77....... 2.916 x 10-14

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