Question: what is the difference between sodium chloride and lactated ringer's?
Answer: Normal saline contains approximately 154mM Na+ and Cl- with average pH of 5.0 and osmolarity of 308mOsm/L. LR solution has electrolytes 130mM Na+, and 109mM Cl-, 28mM lactate. The Average pH of LR is 6.5 and is slightly hypo-osmolar with 272mOsm/L.