What is formed when an acid dissociates in water, according to the Brønsted-Lowry definition?

A) a conjugate acid

B) a salt

C) a conjugate base

D) a stronger acid

C) a conjugate base

Explanation:

Acid is the molecule that will release H+ ion when dissolved. A solution will become more acid as the concentration of H+ ion higher.

According to the Brønsted-Lowry definition, acid called donor proton, because the molecule losing H+(only consists of 1 proton). Water will receive the proton so its called base. The product of acid that loses H+ will become a conjugate base, while water that receives H+ will become conjugate acid.

8

explanation:

each principal energy level above the first contains one s orbital and three p orbitals. a set of three p orbitals, called the p sublevel, can hold a maximum of six electrons. therefore, the second level can contain a maximum of eight electrons - that is, two in the s orbital and 6 in the three p orbitals.

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answer: the enthalpy of the overall chemical reaction is +87.88 kj or +88 kj.

according to hess's law, the overall enthalpy of a reaction is the difference between the sum of enthalpy values of all the products and the sum of enthalpy values of all the reactants.

δh(reaction) = ∑nδh(products) - ∑nδh(reactants)

δh(reaction) = [δh +δh] - [δh]

δh(reaction) = [1(-287.02) + 1(0) ] - [1(-374.9)] kj = +87.88 kj

here, δh (pcl3) = -287.02 kj, δh(cl2) = 0, δh(pcl5) = -374.9 kj

therefore, enthalpy of the overall reaction is +87.88 kj or +88 kj.