failure or refusal to comply, as with a law, regulation, or term of a contract. Origin of noncompliance. 1680-1690. First recorded in 1680-90; non- + compliance.
The main cause of chemical burns is from contact with strong acids or bases. The strength of acids and bases is defined by the pH scale, which ranges from 1-14. A very strong acid has a pH of 1 and may cause a severe burn. A very strong base has a pH of 14 and may also cause a severe burn. A substance with a pH of 7 is considered neutral and does not burn. Chemical burns from acids or bases are also referred to as caustic burns.
The hydrogen ion H(+) can combine with negatively charged elements to form acids. Acids are molecules that can split apart in water and release hydrogen ions. A common example is hydrochloric acid (HCl). When HCl is added to water, it splits apart into H(+) and Cl(-), increasing the number of hydrogen ions in the waterâHCl solution. Bases are molecules that can split apart in water and release hydroxide ions. The most common example is sodium hydroxide (NaOH). When NaOH is added to water, it splits apart into Na(+) and OH(-). The hydroxide ions can combine with hydrogen ions (therefore, decreasing the number of hydrogen ions in the solution) to form more water. The principles of how acids and bases react in water form the basis of the pH scale. The pH scale