Andre adds a spoonful of baking soda to a glass of vinegar. Bubbles begin to appear in the vinegar. The bubbles signal the formation of a compound. I hope the answer helped you.
Answer:
Kc = 826
Explanation:
For the equilibrium:
8 H₂S (g) ⇄ 8 H₂(g) + S₈ (g)
the equilibrium constant is:
Kc = [ H₂ ] ⁸ x [ S₈ ] / [H₂S]⁸
Kc = 0.600⁸ x 0.750 / (0.250)⁸ = 1.68 x 10⁻² x 0.750 / 1.53 x 10⁻⁵
= 824
Be careful with raising to the power of 8 in your calculator.
To calculate the solubility product, Ksp, of the compound Ag2CrO4. We need its dissociation reaction and the concentration of each ion in the solution. Since the concentration is not given then we can only show an expression for the calculation of such.
Ag2CrO4<span> > 2Ag+ + CrO4-2
</span>
Ksp = [Ag+]² [<span>CrO4 2-] </span>
Answer:
Precipitation will occur after the concentration of fluoride ions exceeds 0.01 M.
4 mL volume of NaF must be added to cause 
to precipitate.
Explanation:
Concentration of barium ions = ![[Ba^{2+}]=0.016 M](https://tex.z-dn.net/?f=%5BBa%5E%7B2%2B%7D%5D%3D0.016%20M)
Volume of barium ion solution = 2.0 L
The solubility product of the barium fluoride = 
![K_{sp}=[Ba^{2+}][F^-]^2](https://tex.z-dn.net/?f=K_%7Bsp%7D%3D%5BBa%5E%7B2%2B%7D%5D%5BF%5E-%5D%5E2)
![1.6\times 10^{-6}=[0.016 M]\times [F^-]^2](https://tex.z-dn.net/?f=1.6%5Ctimes%2010%5E%7B-6%7D%3D%5B0.016%20M%5D%5Ctimes%20%5BF%5E-%5D%5E2)
![[F^-]=0.01 M](https://tex.z-dn.net/?f=%5BF%5E-%5D%3D0.01%20M)
Precipitation will occur after the concentration of fluoride ions exceeds 0.01 M.
Concentration of fluoride ion = 
Volume of solution = 
Concentration of NaF solution added = 
Volume of NaF solution added = 
1 L = 1000 mL
0.004 L = 0.004 × 1000 mL = 4 mL
4 mL volume of NaF must be added to cause to precipitate.
