Basic anions none think about why 1 anions of weak

This preview shows page 4 - 7 out of 8 pages.

BASIC ANIONS None (think about why) 1. Anions of WEAK acids F - , CH 3 COO - , ClO - HCOO - , CN - , NO 2 - 2. Most anions of polyprotic acids HCO 3 - , HS - , HCO 3 - , HPO 4 2- CO 3 2- , SO 4 2- , SO 3 2- , S 2- , PO 4 3- Indicate whether each of the following compounds will gave an acidic, basic or neutral solution when dissolved in water. 1) The pH will be less than 7. 2) The pH will be approximately equal to 7.
Image of page 4

Subscribe to view the full document.

barium nitrite potassium nitrate 3) The pH will be greater than 7. Feedback: ammonium iodide = NH 4 I NH 4 + is the conjugate acid of the weak base NH 3 . It is acidic. I - is the anion of the strong acid, HI . It is neutral. Therefore the solution is acidic with a pH < 7. barium nitrite = Ba(NO 2 ) 2 Ba 2+ is the cation of the strong base, Ba(OH) 2 . It is neutral. NO 2 - is the conjugate base of the weak acid HNO 2 . It is basic. Therefore the solution is basic with a pH > 7. potassium perchlorate = KClO 4 K + is the cation of the strong base, KOH . It is neutral. ClO 4 - is the anion of the strong acid, HClO 4 . It is neutral. Therefore the solution is neutral with a pH approximately equal to 7. potassium nitrate = KNO 3 K + is the cation of the strong base, KOH . It is neutral. NO 3 - is the anion of the strong acid, HNO 3 . It is neutral. Therefore the solution is neutral with a pH approximately equal to 7.
Image of page 5
Types of Acid/Base Reactions 1. Strong Acid + Strong Base ----> Water + salt ... pH = Neutral Example: HCl + NaOH ----> H 2 O + NaCl Net Ionic Equation: H 3 O + + OH - ----> 2H 2 O 2. Weak Acid + Strong Base ----> Water + weak base ... pH = Basic Example: HF + NaOH ----> H 2 O + NaF Net Ionic Equation: HF + OH - ----> H 2 O + F - Conjugate base of a weak acid = Basic. 3. Strong Acid + Weak Base ----> Weak Acid ... pH = Acidic Example: HCl + F - ----> HF Net Ionic Equation: H 3 O + + F - ----> HF + H 2 O Conjugate acid of a weak base = Acidic. 4. Weak Acid + Weak Base ---- > Weak Acid + Weak Base ... pH depends upon relative K a values Example and NIE: HCN + F - ---- > HF + CN - Strong bases react completely with ANY acid.
Image of page 6

Subscribe to view the full document.

Image of page 7
You've reached the end of this preview.

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern