0.04635
First, calculate the number of moles of KHP you have by dividing the mass by the molar mass.
0.1768 g / 204.2 g/mol = 0.0008658 mol
Since it takes 1 mole of KOH to neutralize 1 mole of KHP, that means that the 18.68 ml of the KOH solution had 0.0008658 moles of KOH. Since molarity is defined as the number of moles per liter, divide the number of moles by the volume of solution (in liters). So
0.0008658 mol / 0.01868 l = 0.04635 mol/l
So the molarity of the KOH solution is 0.04635
