This is from my professor\'s practice exam. Please answer these with a brief exp

Question

This is from my professor's practice exam. Please answer these with a brief explanation for each answer so I can understand the material. Thank you and I will leave thumbs up!

(18 pts ) 1. a) A substance which can act as either an acid or a base is called ____________________. The Bronsted-Lowery concept of a base is a substance which can _________________________ . In the Lewis concept of acids and bases, a acid is a substance which can _____________________________ . b) What is the conjugate acid of H2AsO4 - _________________ and what is its conjugate base___________________ ? c) Arrange the following compounds in the order of increasing basic strength : CsOH, NH3, CH3NH2, BrNH2 _____________________________________ ? d) When the following salts are dissolved in water describe the resulting solution as acidic, neutral, or basic. CH3NH3Br _____________ ; Na2C2O4______________ ; NaBr _______________

Explanation / Answer

a) A substance which can act as either an acid or a base is called __amphoteric___. The Bronsted-Lowery concept of a base is a substance which can ___accept Proton _________ . In the Lewis concept of acids and bases, a acid is a substance which can ___accept lone pair of electron_________ .

b) What is the conjugate acid of H2AsO4 - ___H3AsO4 _____ and what is its conjugate base____HAsO4 -2 .

c) Arrange the following compounds in the order of increasing basic strength : CsOH, NH3, CH3NH2, BrNH2 __BrNH2 < CH3NH2 < NH3 < CsOH

d) When the following salts are dissolved in water describe the resulting solution as acidic, neutral, or basic. CH3NH3Br __Acidic___ ; Na2C2O4__Basic____ ; NaBr __Neutral___.

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