42 year old male, 62kg, hypokalaemia. Dr orders 40mEq KCl IV. For KCl to be infused peripherally, hospital policy is 10mEq/100ml max concentration and 10mEq/hour max administration rate. Pharmacy stocks 20mEq/50ml KCl.

i) How would you prepare the KCl for peripheral administration and at what rate should it be administered? (3 marks)

ii) What is the total osmolarity (mOsm/L) of the above IV solution if 0.9% NaCl was used as the diluent. (KCl=74.5; NaCl=58.4) (3 marks)