1 g of unknown acid is dissolved in 100.0 mL deionized water. Half the solution is transferred to a flask, where 1 or 2 drops of phenolphthalein indicator are added. The solution is then titrated to the endpoint with 0.5 M NaOH. The neutralized half is combined with the remaining half to create a buffer solution with a pH of 5.04. What is the Ka of the acid and the pKa?

Astudent made the lewis dot diagram of a compound as shown. mg is written with two dots shown on its top. an o is written on each side of mg. each o has six dots around it. an arrow is shown from one dot on mg toward the vacant space around the o on the right. another arrow is shown from the other dot on mg toward the vacant space around the o on the left. the title of the art is students lewis dot model. what is the error in the lewis dot diagram? an o atom should transfer all its six electrons to mg because the formula is mgo. both electrons of mg should be transferred to one o atom because the formula is mgo. the electrons should be transferred from each o atom to mg because mg has fewer electrons. the number of dots around mg should be four because it has to transfer two electrons to each o.