Viscosities of Solutions of Potassium in Liquid Ammonia and Deuteroammonia

The viscosities of solutions of potassium in liquid ammonia and deuteroammonia have been measured with an Ostwald viscosimeter at − 33.6, 0.0, and + 20.0°C over a concentration range from zero to approximately 1.5 mole liter⁻¹. The methods of measurement and the experimental results are given. The viscosities η of the pure liquids, measured in centipoise, are least‐squares fitted by the relations $${\log }_e\text{η\hspace{0.17em}=\hspace{0.17em}−4.677 +1.577/RT}\mathrm{for\; ammonia}$$ and $${\log }_e\text{η=−4.676+1.670/RT}\mathrm{for\; deuteroammonia},$$ in which $R$ is the gas constant and $T$ is the Kelvin temperature. (The standard deviations are given in parentheses.) The viscosities of the solutions have been discussed previously.