Which of the following statements is completely correct? a. nh3 is a weak base, and h2co3 is a strong acid. b. h2co3 is a strong acid, and naoh is a strong base. c. nh3 is a weak base, and hcl is a strong acid. d. h2co3 is a weak acid, and naoh is a weak base. e. nh3 is a strong base, and hcl is a weak acid.

C) NH3 is a weak base (alkali), and HCl is a strong acid.

Explanation:

Remember that bases and acids are determined by the Ph of a the substances, NH3 has a Ph of 11 making it a weak base, strong bases have 12 or more, remember that neutral Ph is around 7, and HCl has a ph of 3.01 making it a strong acid, it has so the correct statement would be C) NH3 is a weak base (alkali), and HCl is a strong acid.

Remember that weak acids gor from 5 to 7 and weak bases go from 8-11

the correct answer is b. a strong acid completely dissociates to its ions when dissolved in water. completely dissociates to and ions. a is incorrect because does not fully ionize to and ions and some remain as the compound . c and d are incorrect because, and do not fall into the category of bronsted lowry acids. a bronsted lowry acid is a proton donor and since both molecules do not have a proton to donate they are not bronsted lowry acids. likewise,   if we use the lewis acid definition, they cannot be acids. a lewis acid is an electron pair acceptor. both and have a complete octet so can not accept any electrons which disqualifies them as acids.