The number of pairs of the solutions having the same value of the osmotic pressure from the following is ______ (Assume $100\%$ ionization)
A. $0.500 \,M \,C _2 H _5 OH$ (aq) and $0.25 \,M\, KBr$ (aq)
B. $0.100 \,M \,K _4\left[ Fe ( CN )_6\right]$ (aq) and $0.100\, M\, FeSO _4\left( NH _4\right)_2 SO _4$ (aq)
C. $0.05\, M \,K _4\left[ Fe ( CN )_6\right]$ (aq) and $0.25\, M\, NaCl ( aq )$
D. $0.15\, M\, NaCl ( aq )$ and $0.1\, M \,BaCl _2$ (aq)
E. $0.02\, M\, KCl MgCl _2 \cdot 6 H _2 O$ (aq) and $0.05\, M\, KCl$ (aq)
A. $0.500 \,M \,C _2 H _5 OH$ (aq) and $0.25 \,M\, KBr$ (aq)
B. $0.100 \,M \,K _4\left[ Fe ( CN )_6\right]$ (aq) and $0.100\, M\, FeSO _4\left( NH _4\right)_2 SO _4$ (aq)
C. $0.05\, M \,K _4\left[ Fe ( CN )_6\right]$ (aq) and $0.25\, M\, NaCl ( aq )$
D. $0.15\, M\, NaCl ( aq )$ and $0.1\, M \,BaCl _2$ (aq)
E. $0.02\, M\, KCl MgCl _2 \cdot 6 H _2 O$ (aq) and $0.05\, M\, KCl$ (aq)
Correct Answer: 4
Solution and Explanation
Osmotic pressure is determined by the ion concentration in solution, considering both the dissociation of solutes and the total number of ions produced. In this case, we analyze each pair based on the number of ions they produce when dissociated in solution. The osmotic pressure is directly proportional to the total concentration of dissolved particles.
Pair A, B, D, and E: These pairs have the same osmotic pressures because they produce the same total number of ions when dissociated, despite possibly differing in the nature of the solute. This results in the same ion concentration and osmotic pressure under identical conditions.
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The scientific study of matter’s properties and behaviour is known as chemistry. It is a natural science that studies the elements that makeup matter, as well as the compounds, made up of atoms, molecules, and ions: their composition, structure, qualities, and behaviour, as well as the changes that occur when they mix with other things.
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