The answer is elements gain electrons. Oxidation reduction is elements lose electrons. And oxygen is added/lost can be a type of oxidation/reduction reaction.
The volume of HCl required is 23.89 mL
Calculation of volume:
The reaction:
![HCl + NaOH \rightarrow NaCl + H_2O](https://tex.z-dn.net/?f=HCl%20%2B%20NaOH%20%5Crightarrow%20NaCl%20%2B%20H_2O)
As HCl and NaOH react in 1 : 1 ratio.
Volume of NaOH= 718 mL
Concentration= 0.183M
Volume of HCl= ?
Concentration= 5.50M
Using the dilution formula:
![M_1\times V_1(NaOH)= M_2\times V_2(HCl)](https://tex.z-dn.net/?f=M_1%5Ctimes%20V_1%28NaOH%29%3D%20M_2%5Ctimes%20V_2%28HCl%29)
![0.183\times 718= 5.50 \times V_2\\V_2=\frac{131.394}{5.50} \\V_2 = 23.89 \,mL](https://tex.z-dn.net/?f=0.183%5Ctimes%20718%3D%205.50%20%5Ctimes%20V_2%5C%5CV_2%3D%5Cfrac%7B131.394%7D%7B5.50%7D%20%5C%5CV_2%20%3D%2023.89%20%5C%2CmL)
Therefore,
Volume of HCl required will be 23.89 mL.
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False , it will make it lighter