Chemistry, substance having property of neutralizing acids.
1. Koji se odnosi na alkalije.
2. Koji ima ukuc ceđa
3. Koji sadrži alkalni metal (npr. kalijum, natrijum).
4. Ima pH faktor veći od 7, bazni (hem).
In chemistry, a compound classed as a base that is soluble in water. Alkalis neutralize acids and are soapy to the touch.
The hydroxides of metals are alkalis: those of sodium (sodium hydroxide, NaOH) and of potassium (potassium hydroxide, KOH) being chemically powerful; both were derived from the ashes of plants.
The four main alkalis are sodium hydroxide (caustic soda, NaOH); potassium hydroxide (caustic potash, KOH); calcium hydroxide (slaked lime or limewater, Ca(OH)2); and aqueous ammonia (NH3 (aq)). Their solutions all contain the hydroxide ion OH-, which gives them a characteristic set of properties.
Alkalis react with acids to form a salt and water (neutralization).
KOH + HNO3 ® KNO3 + H2O
OH- + H+ ® H2O
They give a specific color reaction with indicators; for example, litmus turns blue.
A mixture of soluble salts found in arid soils and some bodies of water; detrimental to agriculture.
So koja se dobija iz pepela morskih biljaka, potaša.