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zavuch27 [327]
3 years ago
6

Can someone please help me

Chemistry
1 answer:
Alona [7]3 years ago
5 0

Answer:

Potassium iodide increases the decomposition rate of hydrogen peroxide.

Explanation:

Potassium iodide increases the decomposition rate of hydrogen peroxide because potassium iodide act as a catalyst. A catalyst speed up the process of chemical reaction without reacting with the molecules present in reaction. If the potassium iodide is not present as a catalyst for the decomposition of hydrogen peroxide then the decomposition of hydrogen peroxide takes too much time because the catalyst is absent that speed up the reaction.

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Water acts as a solvent.<br> a. True<br> b. False
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Cu2 -&gt; Cu2+ is it getting oxidized?
KIM [24]

Answer:

Explanation:

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Oxidation:

Oxidation involve the removal of electrons and oxidation state of atom of an element is increased.

Reduction:

Reduction involve the gain of electron and oxidation number is decreased.

Consider the following reactions.

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the oxidation state of copper is changed from +2 to +1 so copper get reduced.

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Na₂CO₃ + H₃PO₄  →  Na₂HPO₄ + CO₂ + H₂O

The oxidation state of carbon on reactant side is +4. while on product side is  also +4 so it neither oxidized nor reduced.

H₂S + 2NaOH → Na₂S + 2H₂O

The oxidation sate of sulfur is -2 on reactant side and in product side it is also -2 so it neither oxidized nor reduced.

7 0
3 years ago
Acidic<br> Basic<br> Neutral
lana66690 [7]
The answer is acidic
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zhuklara [117]
There the picture is the answer from the internet

8 0
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Which of the following statements is true?
Ivan

Answer:

B.

Explanation:

Most metals can be drawn into a wire while nonmetals would break apart.

5 0
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Read 2 more answers
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