<u>Given:</u>
Concentration of HNO3 = 7.50 M
% dissociation of HNO3 = 33%
<u>To determine:</u>
The Ka of HNO3
<u>Explanation:</u>
Based on the given data
[H+] = [NO3-] = 33%[HNO3] = 0.33*7.50 = 2.48 M
The dissociation equilibrium is-
             HNO3   ↔    H+      +      NO3-
I            7.50               0                 0
C          -2.48          +2.48              +2.48
E            5.02            2.48              2.48
Ka = [H+][NO3-]/HNO3 = (2.48)²/5.02 = 1.23
Ans: Ka for HNO3 = 1.23
 
        
             
        
        
        
Phenolphthalein turn pink in basic solutions.it turn colourless in acid solution.
Hence options(1)is correct
        
                    
             
        
        
        
Answer:
to go against dangerous viral and bacteria
Explanation: