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kompoz [17]
3 years ago
14

What type of reaction is shown below? Ca + 2H2O - Ca(OH)2 + H2

Chemistry
1 answer:
krek1111 [17]3 years ago
5 0
A + BC  ---> AB + C
So here one reactant (A) is accepting a group which is being given by another compound (BC) however the A is not giving any group / element or ion
So this single displacement
Similarly in the given reaction
the anion OH- is only being replaced
The element Ca accepts OH- and H2O loses the same group to form new element H2
So the correct answer is
Single replacement also known as single displacement.
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Answer:

a) H2SO4 + 2KOH -> 2H2O + K2SO4

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Explanation:

Number of Moles = Mass/ Molar Mass

Therefore: Mass = Number of moles * Molar Mass

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Molar mass of H2SO4:

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H2SO4 has the molar mass of 98.09

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the Moles of H2SO4 is given to be 0.100M

Therefore:

Mass= 98.09*0.1

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Assuming that 1 g= 1 ml, the volume of sulfuric acid is 9.809 ml.

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What is the relationship between concentration and rate of reaction?
grigory [225]
<h3><u>Answer;</u></h3>

Directly proportional

<h3><u>Explanation;</u></h3>
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