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zmey [24]
3 years ago
12

Electrochemistry is defined as a science that deals with the relation of electricity to chemical changes and the interconversion

of chemical and electrical energy.
Which activity is most likely involved with the study of electrochemistry? 

neutralizing an acid with a base

producing a gas using a metal and an acid

placing two metal strips in an electrolyte

making a solution from crystals and water
Chemistry
2 answers:
Tanzania [10]3 years ago
6 0
Placing two metal strips in an electrolyte.
My name is Ann [436]3 years ago
4 0

Answer:

placing two metal strips in an electrolyte

Explanation:

In electrochemistry we study the conversion of electrical energy to chemical and chemical energy to electrical energy.

If we place two metal strips in an electrolyte, based on their electrode potential values, one of the metal strip will act as anode and other as cathode. The anode will undergo oxidation and cathode will undergo reduction. This can be like we pass electric current and electrolysis occurs or due to migration of electron electric current is produced. Both the cases will be studied in electrochemistry.

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Determine the pH of a 2.8 ×10−4 M solution<br> of Ca(OH)2.
shepuryov [24]

Answer:

pH = 10.75

Explanation:

To solve this problem, we must find the molarity of [OH⁻]. With the molarity we can find the pOH = -log[OH⁻]

Using the equation:

pH = 14 - pOH

We can find the pH of the solution.

The molarity of Ca(OH)₂ is 2.8x10⁻⁴M, as there are 2 moles of OH⁻ in 1 mole of Ca(OH)₂, the molarity of [OH⁻] is 2*2.8x10⁻⁴M = 5.6x10⁻⁴M

pOH is

pOH = -log 5.6x10⁻⁴M

pOH = 3.25

pH = 14-pOH

<h3>pH = 10.75</h3>
3 0
3 years ago
PLS help
viktelen [127]

Answer:

d . Sc2O5

Explanation:

Hello,

In this case, when forming oxides from a metal and oxygen, for us to find out each element's subscript, we must exchange them as shown below, considering +5 for scandium:

Sc^{+5}_2O^{-2}_5

For that reason, the answer is d . Sc2O5

Best regards.

3 0
3 years ago
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What is the pH of a solution with [H+] = 1.25 mc015-1.jpg 10–10 M?
coldgirl [10]
[ H+]=10-pH
it become
[H+]=0.1
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4.8 L sample of helium gas contains 0.22 moles of helium - How many additional moles of herum gas must be added to the sample to
yawa3891 [41]

Answer:

   

Explanation:

7 0
2 years ago
If I have 251.14 grams of citric acid and calcium bicarbonate mixture how much citrus acid do I have??
Snezhnost [94]
About 255.3 grams is the answer I believe. I just had a school work packet and had that question on it, and that is the answer that I had put on it I believe.
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4 years ago
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