Asking about the first question in the picture. Why is 0.0010 M of weak benzoic

Question

Asking about the first question in the picture. Why is 0.0010 M of weak benzoic acid in 0.0025 M calcium benzoate has a higher pH than same 0.0010 M weak benzoic acid in 0.0025 M sodium benzoate. in other words why is answer C tge correct answer ?

d difficult to predict. 2. Benzoie acid isaweak acid which of the following solutions will have the highest pH a 0.0010 M benzoic acid in water. 4 0.0010 M benzoic acid in 0.0025 M sodium benzoare. e 0.0010 M benzoic acid in 0,0025 M calcium benzoate. d 0.0010 M benaoic acid in 0,0025 M hydrochloric acid. 3. The acid ioniration constant, for propioaicecid, HC,Hyo, is 1.3ix 10 Calculate th percent ionimation of 0,100 M propionic acid olution in water and the percent ionizatioa o.100 M propionic acid in the presence of 0.100 M sodium propionate. Assessment Target Responses

Explanation / Answer

The Lowry Bronsted definition of an acid is in effect any chemical that can release H+. This results in forming the conjugate base, unsurprisingly the definition of a base is a chemical that is able to accept H+.

H+ is actually a proton, so acids and bases are described in terms of their ability to donate or accept protons.

The effectiveness of benzoate ion increases with decreasing pH (increasing acidity). This is because the ratio of undissociated (i.e., free) benzoic acid to ionized benzoic acid increases as the pH decreases.

Also sodium benzoate is strong conjugate in compare to calcium benzoate so concluding 0.0010M benzoic acid in 0.0025M calcium benzoate has more pH than same molarity sodium benzoate

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