Answer:
[F⁻]² = 0.068 M
Explanation:
ZnF₂(s) ⇌ Zn²⁺(aq) + 2F⁻(aq)
At equilibrium the Kps can be calculated by the following equation:
Kps = [Zn²⁺][F⁻]²
Therefore, the concentration of F⁻¹ can be calculated:
[F⁻]² = Kps/ [Zn²⁺]
[F⁻]² = = 3.0 x 10⁻² / 4.4 x 10⁻¹M
[F⁻]² = 0.068 M
Answer:0.00061L He
Explanation:Avogadro constant, N = 6.02214076*10^23 per mole
at STP 1 mole = 22.71L
1.64*10^19 He = ( 1.64*10^19/N)*22.71 = 1.64*10^19*[3.77*10^-23] = 6.18*10^-4L
Explanation:
Given a food with a relative humidity of 81%, what is the water activity of that food?
The water activity of a food can be determined by using the formula:
water activity=relative humidity of food / 100
Answer:
hypochlorite ion
Explanation:
The hypochlorous acid, HClO, is a weak acid with Ka = 1.36x10⁻³, when this acid is in solution with its conjugate base, ClO⁻ (From sodium hypochlorite, NaClO) a buffer is produced. When a strong acid as HCl is added, the reaction that occurs is:
HCl + ClO⁻ → HClO + Cl⁻.
Where more hypochlorous acid is produced.
That means, the HCl reacts with the hypochlorite ion present in solution