Mg(s)+2HCl(aq)→MgCl2(aq)+H2(g)
(since the molar mass of Mg is not given, assuming that it's mola mass is 24gmol¯1)
1st find the moles of Mg using the equation n=m/M where
n - moles
m - mass
M - molar mass
Therefore :
n = 0.39375mol
n = 0.39mol
Then using the equation n=V/Vm where;
n = mol
V = volume
Vm = molar volume
Find the volume.
n = V/Vm
(n =0.39mol , Vm = 22.4dm³mol¯¹)
V = 0.39mol×22.4dm³mol¯¹
V = 8.736dm³
Answer: The positive and negative charges of the water molecule pull on the negative and positive ends of the ionic molecule to break them apart.
Explanation:
Ionic compounds dissolve in polar solvents such as water as like dissolves like. Ionic compounds are made up of ions which remain attracted by coloumbic forces.
Thus to separate the ions, the positive and negative charges of polar solvent pulls the opposite charges of the ionic compounds and thus break them apart. Thus the ionic compounds dissolve in water.
The features of Mendeleev's periodic table which helped us to understand whole periodic table was:
1) Atomic masses. - He arranged all the known elements in increasing order of their atomic mass, atomic mass is quite similar to atomic number (just plus number of neutrons) so, he did from simpler to complex elements, so he sorted his table.
2) Formation of oxides. - He checked for the formation of oxides, and the elements which can form similar oxides, he placed them in a same family (group)
3) Assumed for unknown element. - He just left the place for unknown element, it was the application of other two concepts which i described above, specific atomic mass with no oxides, would create an empty place. So, he just assumed, that element will be discovered in future & he had to left the place.
Hope this helps!
The ion has a positive charge and its Radius is smaller than that of the atom