Question

2.
47. Magnesium oxide is used in the making of the lining of blast
furnaces. It is extracted from sea water as follows.
Aqueous calcium hydroxide is added to seawater.
Ca(OH)2 (aq) + MgCl2 (aq) → Mg(OH) (s) + Caci, (aq)
The magnesium hydroxide is then filtered off and roasted.
Which of the following comparisons between calcium and
magnesium explains why magnesium hydroxide forms?
Magnesium is less electropositive than calcium.
B. Magnesium is lower than calcium in the reactivity series.
C.
The enthalpy.change of hydration for Mg2+ is less
2+
exothermic than for Ca
The solubility product for Mg(OH), is lower than that for
Ca(OH)2
is. less
The magnitude of the lattice energy of Mg(OH),
than that of Ca(OH)2
E.​

Answer 1

Answer:

1)Ca(oh)2+2(hno)3=2(h2o)+ca(no3)

2)Mg+I2=MgI2