water soften ing, and balancing water pH to aid
SODIUM ETHYLENE (EDTA), Na2CH3CH2,
Reagent, used in solution with Diaminetetracetate,
detect minerals which cause hardness in water.
SODIUM HYDROXIDE (Caustic Soda) NaOH, a
strong base (alkaline), white powder used to balance
pH in water to aid coagulation, and absorb chlorine.
SODIUM HYPOCHLORITE NaOC1, a salt
usually furnished in solution, used for disinfection
SULFURIC ACID (Standard), H2SO4, strong
acid, used to balance water pH and aid in coa-
THIOSULFATE A salt, used to neutralize chlorine
water. Used to sterilize water sample containers.