What is the pH of the NaOH solution when 0.04 ~g of it dissolved in water and made to 100 ~mL solution?

Step-by-step solution

Molecular mass of NaOH =23+16+1=40 aligned & Molarity = Mass of solute (in g ) Molecular mass of the solute & Volume of solution (in L) & = 0.04 1000 40 100 =10⁻² & OH ⁻=10⁻² ~mol / L & So, pOH =- [ OH ⁻ ] & pOH + pH =14 or pH =14-2=12 & aligned