Question

Which statement is true for a 0.10 m solution of hcl? group of answer choices

a.[H₃O⁺]ₑᵩ = 0.10 M
b.[H₃O⁺]ₑᵩ < 0.10 M
c.[H₃O⁺]ₑᵩ > 0.10 M

Answer 1

The true statement for a 0.10 M solution of HCl is [H₃O⁺] = 0.10 M, as HCl is a strong acid and fully dissociates in solution. a.[H₃O⁺]ₑᵩ = 0.10 M

Step-by-step explanation:

The question asks which statement is true for a 0.10 M solution of HCl concerning the concentration of hydronium ions, [H₃O⁺]. Since hydrochloric acid (HCl) is a strong acid, it dissociates completely in water, meaning that the concentration of HCl before dissociation will be equal to the concentration of hydronium ions after dissociation.

Therefore, for a 0.10 M solution of HCl, the concentration of hydronium ions, [H₃O⁺], will also be 0.10 M. Thus, the correct statement is [H₃O⁺] = 0.10 M. The application of the formula pH = -log[H₃O⁺] confirms this since the calculated pH of a 0.10 M HCl solution is exactly 1, which reflects the corresponding hydronium ion concentration.

To maintain the equilibrium where the product of the concentrations of hydronium ions and hydroxide ions is always 1.0×10⁻¹⁴ at 25 °C, the concentration of hydroxide ions will be appropriately lower in the acidic solution of HCl.

Answer 2

The correct hydronium ion concentration ([H3O+]) for a 0.10 M solution of hydrochloric acid (HCl), which is a strong acid, is 0.10 M because HCl dissociates completely in solution. So, the correct option is a.[H₃O⁺]ₑᵩ = 0.10 M.

Step-by-step explanation:

The question regards the concentration of hydronium ions ([H3O+]) in a 0.10 M solution of hydrochloric acid (HCl). HCl is known to be a strong acid, which means it dissociates completely in water. The dissociation of HCl in water produces one hydronium ion for each HCl molecule.

Therefore, in a 0.10 M solution of HCl, every mole of HCl will produce one mole of H3O+, leading to a hydronium ion concentration of 0.10 M. The pH of such a solution can be calculated using the pH formula, pH = -log[H3O+], and considering that the molar concentration of HCl is 0.10 M, the pH would be 1.00. Consequently, the correct option regarding the hydronium ion concentration in a 0.10 M solution of HCl is a. [H3O+] = 0.10 M.