Calculate the formula unit mass of sodium carbonate decahydrate (Na2COs.1 0H2O)
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Answer:
=286
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Washing Soda (Na2CO3.10H20):
It is commonly known
as sodium carbonate.
It is used in the softening of
hard water.
It is commonly used as a
cleaning agent for domestic
purposes.
It is also used in the
manufacturing of paper,
soap, textiles, paints, etc. 2 Na = 2x23 = 46;
1 C = 12;
13 0 13x16= 208 (3 Molecules
from Na2CO3 and 10 from 10H20 = total 13 oxygen
molecules); 20 H = 20;
Mass of Na2CO3.10 H20 = 46 + 12 + 208 + 20 = 286
Unit mass of Na2CO3.10 H₂O is
286 u.
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