Hello everybody, I am chemist. and I prepare ionic membrane and placed in a home made acrylic cell containing 0.1M NaCl separated into two portions by ionic membrane. I applied DC voltage of 9.6V (using 9V battery). Using multi-meter the measured DC voltage in water was 4.45V. The distance between the electrodes is 20cm. The measured amperes were 0.93mA. Can I calculate the resistance from voltage drop? and how? Please help or guide if I m doing wrong.