Strontium And Oxygen Chemical Formula

Reaction of strontium with acids

Strontium dissolves readily hydrochloric acid, forming Sr(II) ions and hydrogen gas, H_two.

Sr(s) + 2 HCl(aq) Sr²⁺ (aq) + 2 Cl⁻ (aq) + H₂ (g)

Reaction of strontium with air

Strontium reacts with oxygen, O_two, forming a protective layer of SrO on the surface. When burned, strontium reacts with both oxygen and nitrogen, N_two:

two Sr(s) + O_ii (g) 2 SrO(southward)
3 Sr(south) + North₂ (g) ii Sr₃N₂ (due south)

Reaction of strontium with carbonate

Sr(Two) is precipitated by carbonate ions.

Srⁱⁱ⁺ (aq) + CO_three ²⁻ (aq) SrCO₃ (southward)

The carbonate is a white crystalline precipitate that easily dissolves in acrid

SrCO₃ (south) + NH₄ ⁺ (aq) Sr²⁺ (aq) + HCO₃ ⁻ (aq) + NH_iii (aq).

Reaction of strontium with chromate

Sr(2) is not precipitated by chromate ions in acetic acid..

Reaction of strontium with halogens

Strontium reacts with chlorine, Cl₂, bromine, Br_ii, and iodine, I_ii, forming the corresponding Sr(Ii) halides. The reactions with bromine and iodine requires heat:

Sr(s) + Cl₂ (thousand) SrCl_ii (s)
Sr(s) + Br₂ (chiliad) SrBr₂ (due south)
Sr(due south) + I₂ (g) SrI_two (s)

Reaction of strontium with hydrogen

Strontium reacts with hydrogen, forming strontium hydride [vi].

Sr(s) + H₂ (g) SrH₂ (southward)

Reaction of strontium with hydroxide ions

Sr(II) is not precipitated by OH⁻ (S[Sr(OH)₂] = 0.8 g/100 ml @ 20 °C).

Reaction of strontium with oxalate

Sr(II) is precipitated past ammonium oxalate

Sr^two+ (aq) + C₂O₄ ^two− (aq) SrC_iiO₄ (s)

The oxalate is a white crystalline precipitate that dissolves in mineral acids

SrC₂O₄ (s) + two H⁺ (aq) Sr²⁺ (aq) + H₂C_twoO₄ (aq).

Reaction of strontium with sulfate

Sr(II) is precipitated by sulfate ions at neutral or slightly acidic solutions. The sulfate is a white crystalline precipitate.

Sr²⁺ (aq) + SO₄ ²⁻ (aq) SrSO₄ (south)

In stiff acidic solutions SrSO_four dissolves equally the sulfate concentration becomes to minor:

And then_iv ²⁻ (aq) + H⁺ (aq) HSO_four ⁻ (aq), L[SrSO₄] = 4·ten^-7 M².

Reaction of strontium with sulfide

Sr(2) does non precipitated by H₂Southward or sulfide ions in acidic or element of group i solutions.

Reaction of strontium with water

Strontium reacts slowly with water, forming strontium hydroxide, Sr(OH)_two and hydrogen gas, H_two.

Sr(s) + 2 H_twoO(l) Sr(OH)₂ (aq) + H₂ (g)

Quantitative analysis

Method 3500-Sr C Inductively Coupled Plasma Method [2]. A portion of the sample is digested in a combination of acids. The digest is aspirated into an 8,000 1000 argon plasma where resulting lite emission is quantified for 30 elements simultaneously.

Method limit of detection in h2o = 0.002 mg/L
Method limit of detection in soil = 1.00 mg/kg.