Please show how to answer 12), 13), and 14). We\'re doing a retake and I didn\'t
ID: 1029261 • Letter: P
Question
Please show how to answer 12), 13), and 14). We're doing a retake and I didn't even know where to begin with these. I want to be shown how to answer these problems so I can be prepared for the retake. Thank you. / Current Material I1 Questions 12) A salt, ZX, , has solid sitting at the bottom of a beaker at 25 C: it has 4.5x10 M in Z 1.9-10..M in '.calculate the Ksp for the salt. and ho 13) Which has the lowest solubility : calcium carbonate, calcium chromate, calcium fluoride, or calcium hydroxide? Show your mathematical and other reasons. 14) Will strontium carbonate precipitate from a combination of 300.00mL of 0.0500M strontium nitrate with 1.00mL of 2.0x10 M sodium carbonate?Explanation / Answer
12.
[Z+3] = 4.5x10^-4M
[X-]= 1.9x10^-4M
ZX3 --------------- Z+3 + 3 X-
Ksp = [Z+3][X-]^3
Ksp = 4.5x10^-4 x(3x1.9x10^-4)^3
Ksp= 8.33x10^-14.
14)
Strontium nitrate = Sr(NO3)2=300.0ml of 0.0500M
Sodium carbonate = Na2CO3 = 1.00ml of 2.0x10^-3M
Total volume = 300.00 + 1.00 ml= 301.00ml
Sr(NO3)2 + Na2Co3 --------- SrCO3 + 2 NaNO3
after mixing the solutions
concentration of Sr(NO3)2 = 300.00x0.0500/301.00= 0.0498M
concentration of Na2CO3 = 1.00x2.0x10^-3/301.0= 6.64x10^-6M
SrCO3 --------- Sr+2 + CO3-2
Q= [Sr+2][CO3-2]
Q= 0.0498 x6.64x10^-6
Q=3.307x10^-7
Ksp of SrCO3 = 5.4x10^-10.
Q > KsP
So SrCo3 is precipitated.
13. Ksp of CaCO3 = 8.7x10^-9
Ksp of CaCrO4 = 7.1x10^-4
Ksp of CaF2 = 4x10^-11
Ksp of Ca(OH)2 = 6x10^-6
on the basis of Ksp values CaF2 is low solubility.
Related Questions
drjack9650@gmail.com
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.