Answer:
Ksp = 4x³
Explanation:
Step 1: Write the reaction for the solution of calcium hydroxide
Ca(OH)₂(s) ⇒ Ca²⁺(aq) + 2 OH⁻(aq)
Step 2: Make an ICE chart
Let "x" be the molar solubility of calcium hydroxide.
Ca(OH)₂(s) ⇒ Ca²⁺(aq) + 2 OH⁻(aq)
I 0 0
C +x +2x
E x 2x
Step 3: Write the expression for the solubility product constant (Ksp)
The solubility product constant is equal to the product of the concentrations of the products raised to their stoichiometric coefficients.
Ksp = [Ca²⁺] × [OH⁻]² = x × (2x²) = x × 4x² = 4x³
Answer:
Gravity
Explanation:
Nuclerar fusion and fission does include the others I think
Decomposition of stone due to acid rain<span />
Answer: Magnesium
Explanation:
Galvanic cell is a device which is used for the conversion of the chemical energy produces in a redox reaction into the electrical energy.
The standard reduction potential for magnesium and zinc are as follows:
![E^0_{[Mg^{2+}/Mg]}= -2.37V](https://tex.z-dn.net/?f=E%5E0_%7B%5BMg%5E%7B2%2B%7D%2FMg%5D%7D%3D%20-2.37V)
![E^0_{[Zn^{2+}/Zn]}=-0.76V](https://tex.z-dn.net/?f=E%5E0_%7B%5BZn%5E%7B2%2B%7D%2FZn%5D%7D%3D-0.76V)
Reduction takes place easily if the standard reduction potential is higher (positive) and oxidation takes place easily if the standard reduction potential is less (more negative).
Here Mg undergoes oxidation by loss of electrons, thus act as anode. Zinc undergoes reduction by gain of electrons and thus act as cathode.
Thus magnesium gets oxidized.
Answer:
(3) NaNO₃
Step-by-step explanation:
Sodium nitrate has ionic bonds, because it consists of Na⁺ and NO₃⁻ ions.
However, the nitrate ions have <em>covalent bonds</em> between the O atoms and the central N atoms.
(1) and (2) are <em>wrong</em>. Both N₂O₅ and HCl consist of nonmetals, so they are <em>covalent</em> compounds.
(4) is <em>wrong</em>. NaCl has <em>only ionic bonds</em> between the Na⁺ and Cl⁻ ions
