Fill in this table with the pertinent information for each of the following comp

Question

Fill in this table with the pertinent information for each of the following compounds. Below the table, write out the K, and K, equilibrium for all compounds that are weak. appropriately. If two are the same, label with both numbers. An example is given on the back of this page. Be sure to number the compounds Weak acid /strong Formula of If salt, cation? Anion? acid/ weak base/How do you know? strong base/neutral? Formula of conjugate Compound: A u know? obebare NaCN HCN NaOH CH NH,Br CH,NHz (C2Hs)N HNO

Explanation / Answer

Dear Student,

Sr. No.

Compound

If Salt Cation/Anion

Weak acid/strong acid or weak base /strong base or Neutral

How do you know

Formula of conjugate

1.

NaCN

Na+ CN-

Weak base

Its conjugate acid cyanic acid is weak acid having pKa value of 9.1

CN-

2.

HCN

H+ CN-

Weak acid

Partially ionized in the solution

HA

3.

NaOH

Na+ OH-

Strong base

Soluble salt of hydroxide

Na+

4.

CH3NH3Br

CH3NH3+ Br-

CH3NH3+ is a Weak acid and Br- is neutral

pKb = 4.4 x 10-4

Conjugate of a strong acid

HBr

5.

CH3NH2

CH3+ NH2-

Strong base

pKb =3.36

NH2-

6.

(C2H5)3N

(C2H5)3+ N-

Weak acid

pKa = 6 x 10-4

N-

7.

HNO3

H+ NO3-

Strong acid

On the list of strong acids

H+

Sr. No.

Compound

If Salt Cation/Anion

Weak acid/strong acid or weak base /strong base or Neutral

How do you know

Formula of conjugate

1.

NaCN

Na+ CN-

Weak base

Its conjugate acid cyanic acid is weak acid having pKa value of 9.1

CN-

2.

HCN

H+ CN-

Weak acid

Partially ionized in the solution

HA

3.

NaOH

Na+ OH-

Strong base

Soluble salt of hydroxide

Na+

4.

CH3NH3Br

CH3NH3+ Br-

CH3NH3+ is a Weak acid and Br- is neutral

pKb = 4.4 x 10-4

Conjugate of a strong acid

HBr

5.

CH3NH2

CH3+ NH2-

Strong base

pKb =3.36

NH2-

6.

(C2H5)3N

(C2H5)3+ N-

Weak acid

pKa = 6 x 10-4

N-

7.

HNO3

H+ NO3-

Strong acid

On the list of strong acids

H+

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