Answer:
There are many errors possible while titrating the acid of an unknown concentration with a base like NaOH.
Main error that leads to the error in results is misreading of the end point volume . 
End point is when the reaction between the analyte and solution of known concentration has stopped . 
Sometimes Burette is not straight enough to read the volume of the end point. One way to misread the volume of burette is by looking at the burette volume at an angle . 
From above , volume seems to be higher. Indicators are used to indicate the color change of the reaction. In Acid-Base titrations , indicators first lighten up then changes its color. 
So, error may have occurred in wrongly judging of the end point by color change of the indicator .
 
        
             
        
        
        
Based on Le Chatelier's principle, if the equilibrium of a system is disturbed by changing the temperature, pressure or concentration, then it will shift in a direction to undo the effect of the induced change.
The given equilibrium is:
A + B ↔ AB
Removal of the reactant A implies that the concentration of A has decreased, therefore the equilibrium will shift in a direction to produce more of A. Thus, it will shift to the left and the rate of the reverse or backward reaction will increase. 
 
        
                    
             
        
        
        
The people of he world believe and they don't believe.
I,myself, think we do land don't live in multiverse.
Why: Because in science I hear that there are many universes out there that need to b explored.
Not: Because if we did, don't you think that Astronauts and the U.S. would try and find different universes.
I hope I helped you!:)
 
        
             
        
        
        
the double helix is hydrogen bonded through the bases only so the bases are inside the helix only 
as adenine combines with thymine and guanine with cytosine 
phosphate are in the exterior of it 
sugar groups constitute the double helix.