Answer the following question utilizing the table provided. In the table below t

Question

Answer the following question utilizing the table provided. In the table below the only listed Ka/Kb value is for HClO = 2.9*10-8. From this I can gather the Kb value of NaClO by using Kb= 1.0*10-14/2.9*10-9 = 3.4*10-7. These are the only values I am able to derive from the provided information and without memorizing the Ka and/or Kb values.

My question being is there a way to calculate the Ka/Kb value utilizing the provided table/ values that I am unaware of and if so how? is the table missing critical values making the question unanswerable without more information? or am I just burnt out from studying and have repeatedly overlooked the obvious. Thank you in advance for the assistance

Explanation / Answer

From the given list first identify the acids

HClO2, HClO, HBrO

Salts BaCL2 , NaClO and NaClO2

Among the salts BaCl2 is salt of strong acid HCl and strong base Ba(OH)2 . Thus is neutral with pH = 7.0

NaClO and NaClO2 are salts of strong base NaOH with weak acids HClO and HClO2 repectively.

Their pH >7 and can be calculated using the formula

pH = 1/2 [ pKw +pKa + log C]

Thus if you take same concentration of the salts , the higher the pKa of the acid , the weaker is the acid and hgher is the pH of its salt.

Now arrange the acids in decreasing order of acidic nature.

HClO2 > HClO > HBrO

Then NaClO has higher pH than NaClO2.

Thus he order of the givencompounds from strongest acid to strongest base is   

HClO2 > HClO > HBrO > BaCl2 > NaClO2 > NaClO

Related Questions

Navigate

• Browse (All)
• Browse A
• Subjects