When equal volumes of 0.1 M solutions of HCl and NaOH aremixed, the total number

Question

When equal volumes of 0.1 M solutions of HCl and NaOH aremixed, the total number of ions presentwill be approximately A)     twice as great as beforemixing.        
B)       the same as beforemixing. C)       half as great as beforemixing.         
D)       10–7 times asgreat as before mixing. E)       10–14 timesas great as before mixing. Please EXPLAIN youranswer. When equal volumes of 0.1 M solutions of HCl and NaOH aremixed, the total number of ions presentwill be approximately A)     twice as great as beforemixing.        
B)       the same as beforemixing. C)       half as great as beforemixing.         
D)       10–7 times asgreat as before mixing. E)       10–14 timesas great as before mixing. Please EXPLAIN youranswer.

Explanation / Answer

You add HCl to NaOH and you get water H+ + Cl- + Na+ + OH- H2O +NaCl(aq) All of the H+ and OH- ions are then consumed. But then you still have NaCl as Na+ and Cl-. So only half of theions (H+ and OH-) are gone. answer C)

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