pH represents acidity or alkalinity of an aqueous solution and is proportional to the hydrogen-ion concentration of the solution. Under neutral conditions water is dissociated into the (OH)^— and H⁺ ions in equal ratio and hence it has a pH of 7. When bases or acids are added to a water solution they ionize, increasing the concentration of (OH)^— or H⁺, respectively. Thus solutions with a pH of 1-3 contain strong acids, whereas those with a pH of 4-6 contain weak acids.

Weak bases result in solutions of pH 8-10 and strong bases in pH of 11-13.

Order Information:
HI 38058 test kit comes with 30 mL pH 4.0-10.0 reagent, checker disc, glass vials with caps (2) and 3 mL plastic pipette.

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