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Daniel [21]
3 years ago
9

Concentrated sulfuric acid is generally used to promote acid-catalyzed dehydration because:

Chemistry
1 answer:
ira [324]3 years ago
7 0
Concentrated  sulfuric  acid  is  used    to promote  acid  catalyzed  dehydration  because  it  has   little  water.This favor the  forward  reaction.sulfuric  acid  acts  as  as  proton  source  to  enable  loss  of  leaving  group  in  forward  reaction  and electrophile  addition  in  reverse  reaction.
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Consider a circuit in which the left half-cell was prepared by dipping a Pt wire in a beaker containing an equimolar mixture of
Step2247 [10]

Answer:

a) Ti⁻²|Ti || Pt|Pt⁻²

b) +2.83 V

c) Pt + Ti⁻² → Pt⁻² + Ti

d) Pt

Explanation:

a) In the cell circuit, a redox reaction will happen, and one of the electrodes will oxide (it will lose electrons) and the other will reduce (it will gain electrons). The potential to reduce is measured by the standard potential reduction (E°). As higher is it, as easy is to the reduction reaction happens. The values for Pt and Ti are:

Pt + 2e⁻ → Pt⁻² E° = +1.20 V

Ti + 2e⁻ → Ti⁻² E° = -1.63 V

So, Pt will reduce and Ti will oxide. The oxidation reaction is the opposite of the reduction, and at the line notation, first is placed the oxidation reaction, thus:

Ti⁻²|Ti || Pt|Pt⁻²

b) The cell voltage (ΔE°) is the E° of the reduction reaction less the E° of the oxidation reaction:

ΔE° = 1.20 - (-1.63)

ΔE° = +2.83 V

c) The spontaneous net cell reaction will be the sum of the reduction reaction and the oxidation:

Pt + 2e⁻ → Pt⁻² (reduction)

Ti⁻² → Ti + 2e⁻ (oxidation)

----------------------------

Pt + Ti⁻² → Pt⁻² + Ti

d) In the cell, the electrodes are called cathode and anode. The electrode where the oxidation occurs is the anode, and the other, where the reduction occurs, is the cathode. Thus, in this case, the Pt electrode is the anode.

4 0
3 years ago
Name one state of matter
Alex73 [517]

Answer:

solid

Explanation:

7 0
3 years ago
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Drupady [299]
By measuring the temperature of a thing it can be determined whether it is hot or cold. Temperature of the thing can be measured by degree Centigrade or by degree Fahrenheit. This is the instrument that will exactly measure the temperature of the substance and whether it is hot or cold. If the substance has a higher temperature than our body temperature then it would automatically feel hot to us and if the temperature of the substance is lower than our body temperature, then it will definitely feel cold to us. This is our sense telling us whether the substance in question is hot or cold.
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Which mineral test was used if a geologist refers to a mineral as metallic?
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Streak. It couldn't be hardness because some minerals are soft and metallic, and some are hard and metallic. Also, it can't be luster, because most gems are minerals, and most luster, but they're not metallic. And it can't be magnetism, because magnetite, the only magnetic mineral, is not really metallic.

4 0
3 years ago
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How would one convert 125 lb to kilograms (1 oz = 28 g)?
scZoUnD [109]

Answer:

these answer choices are extremely confusing to read lol.

so the answer is 125lb x 16oz/1lb x 28g/1oz x 1kg/1000g

<em>a p e x</em>

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