CHEM 210 Exam 3 100% Accurate.

Acid - ANSWERa substance that has H+ in its formula and dissociates in water to yield H3O+ -some strong acids are HCl, HI, CHlO4, HBr, H2SO4 and HNO3 -loses proton; forms conjugate base (OH- , hydroxide ion) Base - ANSWERa substance that has OH in its formula and dissociates in water to yield OH- -strong bases include NaOH, KOH, and Ba(OH)2 -a strong base will have OH in its formula -gains proton; forms conjugate acid (H3O+ , hydronium ion) Salt and water are the products in reactions between strong acids and bases - ANSWERHCl(aq) + NaOH(aq) -> NaCl(aq) + H2O(l) -neutralization reaction (salt and water are common products from acid and base neutralizing) When an acid dissociates in water - ANSWERHA + H2O -> A- + H3O+ (H3O+ is called the hydronium ion) What is the principal difference between a strong and weak acid? - ANSWERStrong acids completely ionize where weak acids only partially ionize Characteristics of an acid - ANSWERsour flavor, turns litmus paper red, dissovles some metals Characteristics of a base - ANSWERbitter flavor, turns litmus paper blue, feels slippery Suppose that a benzoic acid (C6H5COOH) solution has a pH of 3.15 Which of these substances would increase the pH of the solution? a) KCl b) NaI c)HBr d)C6H5COONa - ANSWERd In which of these solutions will the weak acid, HCN, ionize less than it does in pure water? a) 0.15M NaOH b) 0.15M KCl c) 0.15M NaNO3 d) 0.15M NaCN - ANSWERd