Dusičnan strontnatý

Dusičnan strontnatý
Vzorec
Vzorec
Vzhled
Vzhled
Obecné
Systematický názevDusičnan strontnatý
Sumární vzorecSr(NO3)2
VzhledBílá krystalická látka
Identifikace
Registrační číslo CAS10042-76-9
Vlastnosti
Molární hmotnost211,63 g/mol (bezvodý)
Teplota tání570 °C (bezvodý) 100 °C (tetrahydrát)
Teplota rozkladu645 °C (na NO2 a SrO)
Hustota2,986 g/cm3 (bezvodý) 2,20 g/cm3 (tetrahydrát)
Rozpustnost ve voděBezvodý:

71 g/100 ml (18 °C)
66 g/100 ml (20 °C)
Tetrahydrát:
60,4 g/100 ml (0 °C)

206 g/100 ml (100 °C)
Rozpustnost v polárních
rozpouštědlech
rozpustný v kapalném amoniaku, málo rozpustný v ethanolu a acetonu.
Bezpečnost
GHS03 – oxidační látky
GHS03
GHS05 – korozivní a žíravé látky
GHS05
GHS07 – dráždivé látky
GHS07
[1]
Nebezpečí[1]
NFPA 704
0
1
0
OX
Není-li uvedeno jinak, jsou použity
jednotky SI a STP (25 °C, 100 kPa).

Některá data mohou pocházet z datové položky.

Dusičnan strontnatý je bílá krystalická látka, anorganická sloučenina, se vzorcem Sr(NO3)2.

Výroba a reakce

Reakce SrCO3 a HNO3
Reakce SrCO3 a HNO3

Tato látka se vyrábí obvykle reakcí kyseliny dusičné a uhličitanu strontnatého. Při reakci je (krom kyseliny dusičné) dusičnan strontnatý rozpustný ve vodě, tak se dá oddělit filtrací. Reakce probíhá takto:

Rovněž je možná reakce kyseliny dusičné s kovovým stronciem:

Při zahřívání probíhá reakce, kdy se rozpadá oxid dusičitý a oxid strontnatý:

Při této reakci se uvolňují plyny, jež podporují hoření. Proto směs dusičnanu strontnatého a cukru plynule hoří rudým plamenem.

Užití

Ohňostroj v Praze, s nejvyšší pravděpodobností se sloučeninami stroncia

Dusičnan strontnatý se využívá v pyrotechnice na zabarvování plamene do ruda, zejména u červených Bengálských ohňů či jiných efektů. Často však bývá nahrazován mnohem levnějším dusičnanem vápenatým, který ovšem nemá tak pěkné efekty jako dusičnan strontnatý. Rovněž se užívá na výrobu jiných anorganických či organických sloučenin stroncia.

Reference

V tomto článku byl použit překlad textu z článku Strontium nitrate na anglické Wikipedii.

  1. a b Strontium nitrate. pubchem.ncbi.nlm.nih.gov [online]. PubChem [cit. 2021-05-23]. Dostupné online. (anglicky) 

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