Ni(OH)₂ ⇄ Ni⁺² + 2 OH⁻
Ksp = [Ni⁺²][OH⁻]² = S (2S)² = 4S³
where S is molar solubility.
at pH = 10
[H⁺] = 10⁻¹⁰
[H⁺][OH⁻] = 10⁻¹⁴
so [OH⁻] = 10⁻⁴ M
Ksp = S [10⁻⁴ + 2S]²
Ksp is very small so the molar solubility of OH⁻ will be very small
so (10⁻⁴ + 2S) is about 10⁻⁴
so Ksp = S x 10⁻⁸
S =
= 6 x 10⁻⁸ M
Answer:
You need to add 3 100 pound bags of Parkerâs Premium Starter and 5 100 pound bags of Vigoro Ultra Turf fertilizer
Explanation:
You can obtain 3 equations. One for each compound:
For N:
177 pounds = 29x + 18y <em>(1) </em>
<em>-</em><em>Where x are bags of Vigoro Ultra Turf fertilizer</em><em> </em><em>and y are bags of </em>Parkerâs Premium Starte-
For P₂O₅:
134 pounds = 3x + 25y <em>(2)</em>
For K₂O:
42 pounds = 4x + 6y <em>(3)</em>
Replacing (1) in (2):
134 = (531/29 - 54y/29) + 25y
3355/29 = 671y/29
<em>y = 5 bags</em>
Thus,
<em>x = 3 bags</em>
You can replace in each equation to prove that this is the right result.
I hope it helps!
<em></em>
The answer is Helium. hope its helpful (:
Option are as follow,
A. temperature, concentration and surface area
<span>B. temperature, and concentration only </span>
<span>C. concentration and surface area only </span>
<span>D. temperature and surface area only
</span>
Answer:
Option-<span>A. Temperature, Concentration and Surface area
</span>
Explanation:
1) Increasing Temperature:
Increase in temperature increases the Kinetic energy of molecules. This results in increase in the velocity and rate of collisions between reactants. Hence, greater the number of collisions between reactants per time greater will be the probability of formation of product per unit time.
2) Increasing Concentration
Increase in concentration results in increase in number of particles of reactants per unit area, hence collision rate increases resulting in rate of reaction.
3) Increasing Surface Area
Grinding of Zn results in the increase of surface area of Zinc. So greater the surface area greater is the exposure of Zinc metal to HCl molecules, hence the rate of formation of product increases.
Answer:
Natural
Explanation:
Because synthetics are man made but cotton is plant based
