The neutral substances in pH are those whose hydrogen potential (pH) is equal to 7. Some of these substances are: pure water, human saliva, sodium chloride, breast milk and ammonium acetate.
PH is a measure of the acidity or alkalinity of a solution. If the pH is less than 7, the solution is acidic. If the pH is greater than 7, then the solution is alkaline.
In the case of substances with neutral pH, this measurement is exactly equal to 7 or very close to this value.
These substances have equal numbers of positive charge hydrogen ions and hydroxyl (hydrogen and oxygen) negatively charged ions.
10 examples of substances with neutral pH
1- Pure water
In pure water the charge of hydrogen positive ions and hydroxyl negative ions is balanced. In that sense, the pH value is exactly equal to 7.
2- Human Saliva
The pH value of human saliva under normal conditions varies in a range between 6.2 and 7.4. It can be said that, on average, it corresponds to a neutral pH.
3- Solution of 10% potassium nitrate
Potassium nitrate is usually used in aqueous solutions as a crop fertilizer.
Assuming a composition of 13% of nitrogen and 44 or 46% of potassium oxide used in a 10% solution, a solution with a neutral pH is obtained.
4- Breast milk
More than 85% of the composition of breast milk is water based, followed by a significant presence of proteins, minerals, vitamins, fat and lactose. The pH of breast milk is neutral.
5- Solution of magnesium sulfate heptahydrate 10%
It is usually marketed in a concentration of 16% magnesium oxide and 13% sulfur. Diluted in 10% water, a substance with neutral pH is produced. This solution is widely used as fertilizer.
6- Cesium chloride 98%
It is currently recommended as part of the diet for cancer patients given their properties against cancer cells. It is also recommended in the treatment of cardiac arrhythmias.
7- Zinc sulphate solution monohydrate 5%
Zinc sulfate has multiple applications. Its 5% monohydrate formulation has neutral pH and is used for agricultural purposes, as fertilizer and to remove moss from the surfaces.
8- Sodium Chloride (Common Salt)
Table salt or common salt comes from the mixture of a strong base (NaOH) and a strong acid (HCl).
When making a solution between both, the ionic balance is maintained, reason why the common chloride of sodium is considered a neutral salt.
9- Ammonium acetate
It is considered as a neutral salt, as it is obtained by mixing a weak acid (acetic acid) and a weak base (ammonia). It is used in chemical analysis, in the pharmaceutical industry and as a food conservator.
10- Potassium Chloride
It is commonly used in the manufacture of fertilizers and as a chemical reagent. Currently it also has an important use in the field of health, since it is used in the treatment of diarrhea and vomiting.
References
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- King, T. (2017). What is the pH of saliva? Recovered from: muyfitness.com
- Licata, M. (s.f.). Breast milk and its nutritional properties. Recovered from: zonadiet.com
- Morais, S., Noguera, P., et al. (s.f.). Acid-base properties of the salts. Universitat Politécnica de Valencia. Valencia Spain. Retrieved from: riunet.upv.es
- Potassium nitrate (s.f.). Recovered from: ipni.net
- What is Neutral pH? (s.f.). Recovered from: queesela.net
- Magnesium Sulphate Heptahydrate (s.f.). Recovered from: fertisa.com
- Treatment of cesium chloride cancer (2017). Recovered from: muyfitness.com
- Wikipedia, The Free Encyclopedia (2017). Potassium chloride. Retrieved from: en.wikipedia.org