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Nina [5.8K]
1 year ago
8

Hydrogen peroxide is oxidized with permanganate solution to produce oxygen gas by the following reaction:

Chemistry
1 answer:
monitta1 year ago
5 0

The percentage yield of the oxygen gas is 60%.

<h3>What is the limiting reactant?</h3>

The reaction equation is;

2H^+ + H2O2 + 2MnO4 -> 2MnO2 + 4H2O + 3O2

Number of moles of hydrogen peroxide = 30/1000 * 0.30 M = 9 * 10^-3 moles

Number of moles of  potassium permanganate = 30/1000 * 0.30 M = 9 * 10^-3 moles

Now;

1 mole of H2O2 reacts with 2 moles of permanganate

 9 * 10^-3 moles of H2O2 reacts with  9 * 10^-3 moles * 2 moles/1 mole  

= 1.8 * 10^-2 moles

Hence, permanganate is the limiting reactant

b) The theoretical yield of oxygen is;

2 moles of oxygen produced 3 moles of O2

9 * 10^-3 moles oxygen  produced 9 * 10^-3 moles *  3 moles/2 moles

= 0.0135 moles

If 1 mole of O2 occupies 22.4 L

0.0135 moles of O2 occupies 0.0135 moles * 22.4 L/ 1 mole

= 0.302 L or 302 mL

c) Percentage yield of oxygen = 178 mL/ 302 mL * 100/1

= 60%

Learn more about percentage yield:brainly.com/question/27492865

#SPJ1

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Answer:

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Explanation:

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3 years ago
If you burn 23.4 g of hydrogen and produce 209 g of water, how much oxygen reacted?
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The chemical reaction is expressed as:

2H2 + O2 = 2H2O

To determine the amount of oxygen used in the reaction, we use the amount of water produced and the relation of the substances in the reaction we do as follows:

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Which of the following 0.300 M solutions would contain the highest concentration of potassium ions?
mojhsa [17]

Here is a list of 0.300 M solutions that you can consider to select which has the highest concetration of potassium ions:

Select one:

a. potassium oxide

b. potassium phosphate

c. potassium hydrogen carbonate

d. potassium hypochlorite

e. potassium iodide

Answer:

  • <em><u>Option b. potassium phosphate</u></em>

Explanation:

First, you must write the chemical formula of each one of the potasssium compounds. Then, assume all the compounds ionize 100%.

Since all the solutions have the same concentrations, by assuming 100% ionization, the ionization equations will show which one produces the highest number of <em>potassium ions</em>, K⁺¹, and that is the solution with the highest concentration of such ions.

<u>1. Chemical formulae</u>

Compound                                              Formula

a. <em>potassium oxide         </em>                          K₂O                                

b. <em>potassium phosphate</em>                          K₃PO₄    

c. <em>potassium hydrogen carbonate</em>          KHPO₃

d. <em>potassium hypochlorite  </em>                     KClO₄

e. <em>potassium iodide     </em>                             KI

<u>2. Dissociation (ionization):</u>

  • a. <em>potassium oxide</em>, K₂O

           K₂O does not dissociate but react with water to product KOH, then KOH dissociates, but there is not such thing as a 0.300 M solution of K₂O.

  • b. <em>potassium phosphate</em>:

       K₃PO₄ → 3K³⁺ + PO₄¹⁻                3 K⁺¹ ions per unit formula

  • c. <em>potassium hydrogen carbonate</em>          

       KHPO₃ →  K⁺¹ + HPO₃⁻¹               1 K⁺¹ ion per unit formula

  • d. <em>potassium hypochlorite </em>                      

        KClO₄ → K⁺¹ + HClO₄⁻¹                1 K⁺¹  ion per unit formula

  • e.<em> potassium iodide</em>                                  

          KI → K⁺¹ + I⁻¹                                1 K⁺¹ ion per unit formula.

Hence, the 0.300 M solution of potasssium phosphate produces the highest concentration of potassium ions.

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Answer:

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Explanation:

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