<span>Na (sodium) is highly electropositive. Its has 1 electron in its outermost orbit which is transferred to an electronegative atom to form an ionic bond.
It only needs to get rid of one valence electron to take part in a reaction. That's how it's highly reactive.</span>
The 0.05 moles of
required to make 1 L of solution in which the
concentration is 0. 15 M.
Calculation,
The Sodium phosphate dissolves as follows:
→ 
To make 1. L of solution in which the
concentration is 0. 15 M
The morality of
= 0.15 M = number of moles / volume in lit
The morality of
= 0.15 M = number of moles /1 Lit
number of moles of
= 0.15 mole
The mole ratio is 1: 3
It means, the 1 mole of
required to form 3 mole of
So, to form 0.15 mole of
= 1×0.15 / 3 moles of
required.
Hence, number of moles of
required = 0.05 moles.
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Entropy change of vaporization is simply the ratio of
enthalpy change and the temperature in Kelvin.
Temperature = 64 + 273.15 = 337.15 K
Hence,
δsvap = (32.21 kJ / mole) / 337.15 K
<span>δsvap = 0.0955 kJ / mole K = 95.5 J / mole K</span>