Which among the following has highest pH ?

Step-by-step solution

For acidic medium, we know that pH values range is between 0-6.9 , for neutral it is 7 and for bases it is 7.1-14 . So, HCl is acidic and NaOH is basic. Thus, we can straight forward infer that NaOH has a higher pH value. Now, 1 mole of sodium hydroxide produces 1 mole of Na ⁺ and 1 mole of OH ⁻ ions. This means that the concentration of the hydroxide ions will be equal to [ OH ⁻ ]=[ NaOH ]=1 M For case A , aligned & pOH =- [ OH ⁻ ]=- [1]=0 & pH =14- pOH =14-0=14 & For case B , & [ OH ⁻ ]=[ NaOH ]=0.1 M & pOH =- [0