NaOH is Sodium hydroxide, but commonly called lye or caustic soda. It is a white solid that is prepared in both pellet and flake forms. Solids do not have a pH. Solutions can have a pH. Water is the usual solvent.
About 111 grams of NaOH will dissolve in 100 mL at room temperature. This is a very high solubility. Experiments have determined that the pH of a saturated solution of Sodium hydroxide will usually be about 15.1 to 15.5. This will lower over time as Carbon dioxide is absorbed into the solution.
As a solid, NaOH is hygroscopic. It will actually pull water from the atmosphere. If add to water, it will readily dissolve but in doing so will also generate a great deal of heat often causing the water to boil.
In the area around the spill, the temperature of the water will rise and the pH will also rise significantly.
The last site below is about a train derailment last July in McKean County, PA, dumped 48,000 gallons of sodium hydroxide into a stream.What is the pH of pure NaOH?
Thank you. It was a good question.
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Pure pH of NaOH is 14.
The formal definition of pH is the negative logarithm of the Hydrogen ion activity.Molecules that dissociate easily will form strong acids or bases when in aqueous solution
This is why the Ph of aqueous NaOH is 14 as it is a base when mixed into the lake water the Ph value of the lake is going to shot up as NaOH is a strong base. The water becomes more basic.
Putting NaOH into a lake will increase the pH, since it is a base.
Pure NaOH in the solid form does not have a pH, since it is not ionized and no OH- ions are formed. The maximum measureable pH of a solution of NaOH is 14.
NaOH is a solid, so it has no pH until it is dissolved in water.
The maximum pH measurable is NOT 14, as there are many pH instruments availalbe that measure beyond the range of 0-14. Usually the highest concentration of NaOH you can get is about 50% by weight, which corresponds to somewhere around 15 M with a pH around 15.2.
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