Answer:
18.8 mL
Explanation:
The dilution formula states that the product between the initial molarity and the initial volume should be equal to the product between the final molarity and the final volume, since the number of moles of a substance remains constant in a dilution process:
We are given the initial molarity of the stock solution , the final molarity of the diluted solution and the final volume of the diluted solution .
Rearranging the expression for the volume of the stock solution, we get:
Therefore, 18.8 mL of the stock solution are required.
The balanced reaction is
Ca + 2H2O → Ca(OH)2 + H2
Here this reaction can be compared with
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
Atomic number
atomic mass
group|family
periods
and element symbols
Sodium Chloride because its still a liquid at the 773 temperature mark<span />