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An aqueous solution containing (molecular mass ) in of water boils at . Calculate the degree of…
(i)
An aqueous solution containing $1\cdot25\text{ g}$ $\text{BaCl}_2$ (molecular mass $208\cdot34\text{ g mol}^{-1}$) in $100\text{ g}$ of water boils at $100\cdot085^\circ\text{C}$.
Calculate the degree of dissociation of $\text{BaCl}_2$.
($K_b$ for water $= 0\cdot52\text{ K kg mol}^{-1}$)
(ii)
What happens when red blood cells are placed in pure water?
(iii)
What are isotonic solutions? Why does the phenomenon of osmosis not occur when two isotonic solutions are separated by a semi-permeable membrane?
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From ISC 2026 Improvement Chemistry Paper 1, question 20.