The salts X(NO₃)₂and Y(NO₃)₂ (where X⁺ and Y⁺ are metal ions) are dissolved in water to give a solution which is 0.1 M in each of them. Using the K_sp values listed below, decide which aqueous reagent, if any, will definitely precipitate X⁺ before precipitating Y⁺ from solution. Given K_spvalues:XCl₂, 1 × 10⁻⁵YCl₂, 1 × 10⁻¹⁰X(OH)₂, 1 × 10⁻¹⁰Y(OH)₂, 1 × 10⁻⁵ A)1 M NaCl B)1 M HCl C)1 M HNO ₃ D)1 M NaOH E)None of these choices are correct.

Question

Quizplus · Accepted Answer

To determine which reagent will definitely precipitate X before Y, we need to compare the Ksp values of their respective salts. The larger the Ksp value, the more soluble the salt is and the less likely it is to precipitate.
Comparing the Ksp values of X and Y:
Ksp of X(NOS1U1B13S1U1B0)S1U1B12S1U1B0 = 1 × 10S1U1P1−S1S1P0S1U1P110 S1S1P0
Ksp of Y(NOS1U1B13S1U1B0)S1U1B12S1U1B0S1U1B0 = 1 × 10S1U1P1−S1S1P0S1U1P15S1S1P0
Since the Ksp value of X is larger, it is less likely to precipitate than Y. Therefore, we need to find a reagent that will precipitate X but not Y.
Looking at the given reagents:
A) 1 M NaCl will not precipitate either X or Y, as both salts are soluble in NaCl.
B) 1 M HCl will not precipitate X, as X does not contain OH-. However, it will also precipitate Y as both Cl- and OH- ions are present in the solution.
C) 1 M HNO3 will not precipitate X or Y, as neither salt contains NO3-.
D) 1 M NaOH will precipitate X, as it contains OH- which will react with X to form a precipitate of X(OH)2. However, it will not precipitate Y, as Y does not contain OH-.
E) None of the given choices will only precipitate X without precipitating Y.
Therefore, the best choice(s) is D, 1 M NaOH, which will precipitate X before Y.

The Salts X(NO3)2 and Y(NO3)2 (Where X+ and Y+ Are

The Salts X(NO₃)₂and Y(NO₃)₂ (Where X⁺ and Y⁺ Are