Answer:
D) 5.15
Explanation:
Step 1: Write the equation for the dissociation of HCN
HCN(aq) ⇄ H⁺(aq) + CN⁻(aq)
Step 2: Calculate [H⁺] at equilibrium
The percent of ionization (α%) is equal to the concentration of one ion at the equilibrium divided by the initial concentration of the acid times 100%.
α% = [H⁺]eq / [HCN]₀ × 100%
[H⁺]eq = α%/100% × [HCN]₀
[H⁺]eq = 0.0070%/100% × 0.10 M
[H⁺]eq = 7.0 × 10⁻⁶ M
Step 3: Calculate the pH
pH = -log [H⁺] = -log 7.0 × 10⁻⁶ = 5.15
The two forms of oxygen, O2 and O3 is "<span>They have different molecular structures and different properties."</span>
Answer by YourHope:
Hi! :)
Which definition of "coarse" matches its use in the phrase "coarse focus?"
A) "rough in texture"
Have a BEAUTIFUL day~
Answer:
D
Explanation:
The proberties of the substances that are produced are different from the properties of the original substances.
