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18 Dec 2019
A solution contains Ba2+ (1.0 Ã 10-3 M), Ca2+ (1.0 Ã 10-3 M) and K+ (1.0 Ã 10-3 M). Drops of a 5.0 Ã 10-1 M solution of NaF were added through a microburet until the [F-] in the solution mix reached 1.5 Ã 10-3 M. Should a precipitate form? If so, what is the precipitate? The Ksp values are BaF2: 1.0 Ã 10-6, CaF2: 5.3 Ã 10-9. (Neglect the slight change in volume resulting from the added NaF solution.)
no precipitate should form
a precipitate consisting of CaF2 only should form
a precipitate consisting of BaF2 only should form
a precipitate consisting of CaF2 and KF should form
a precipitate consisting of BaF2 and CaF2 should form
A solution contains Ba2+ (1.0 Ã 10-3 M), Ca2+ (1.0 Ã 10-3 M) and K+ (1.0 Ã 10-3 M). Drops of a 5.0 Ã 10-1 M solution of NaF were added through a microburet until the [F-] in the solution mix reached 1.5 Ã 10-3 M. Should a precipitate form? If so, what is the precipitate? The Ksp values are BaF2: 1.0 Ã 10-6, CaF2: 5.3 Ã 10-9. (Neglect the slight change in volume resulting from the added NaF solution.)
| no precipitate should form |
| a precipitate consisting of CaF2 only should form |
| a precipitate consisting of BaF2 only should form |
| a precipitate consisting of CaF2 and KF should form |
| a precipitate consisting of BaF2 and CaF2 should form |
Reid WolffLv2
31 Dec 2019
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