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Barium chloride is extracted out from the mixture with water. From water solutions of barium chloride, its dihydrate (BaCl 2 ·2H 2 O) can be crystallized as colorless crystals. [2] Barium chloride can in principle be prepared by the reaction between barium hydroxide or barium carbonate with hydrogen chloride.
A 0.5 McFarland standard is prepared by mixing 0.05 mL of 1.175% barium chloride dihydrate (BaCl 2 •2H 2 O), with 9.95 mL of 1% sulfuric acid (H 2 SO 4). [ 1 ] Now there are McFarland standards prepared from suspensions of latex particles, which lengthens the shelf life and stability of the suspensions.
Science Stuff (Dihydrate) Structure and properties. Structure and properties Index of refraction, n D? Dielectric constant, ... Barium chloride (data page)
CoCl 2 ·6H 2 O – cobalt(II) chloride hexahydrate; SnCl 2 ·2H 2 O – tin(II) (or stannous) chloride dihydrate; For many salts, the exact bonding of the water is unimportant because the water molecules are made labile upon dissolution. For example, an aqueous solution prepared from CuSO 4 ·5H 2 O and anhydrous CuSO 4 behave identically.
barium oxalate: 516–02–9 BaC 4 H 4 O 6: barium tartrate: 5908–81–6 Ba(C 18 H 35 O 2) 2: barium stearate: 6865–35–6 Ba(ClO 3) 2: barium chlorate: 13477–00–4 Ba(ClO 4) 2: barium perchlorate: 13465–95–7 BaCl 2: barium chloride: 10361–37–2 BaCl 2 •2H 2 O: barium chloride dihydrate: 10326–27–9 BaCrO 4: barium chromate ...
Cobalt(II) chloride: CoCl 2: dep blue Cobalt(II) chloride hexahydrate: CoCl 2 ·6H 2 O deep magenta Manganese(II) chloride tetrahydrate: MnCl 2 ·4H 2 O pink Copper(II) chloride dihydrate: CuCl 2 ·2H 2 O blue-green Nickel(II) chloride hexahydrate: NiCl 2 ·6H 2 O green Lead(II) iodide: PbI 2: yellow Ammonium dichromate (NH 4) 2 Cr 2 O 7: orange
Substance Formula 0 °C 10 °C 20 °C 30 °C 40 °C 50 °C 60 °C 70 °C 80 °C 90 °C 100 °C Barium acetate: Ba(C 2 H 3 O 2) 2: 58.8: 62: 72: 75: 78.5: 77: 75
The following chart shows the solubility of various ionic compounds in water at 1 atm pressure and room temperature (approx. 25 °C, 298.15 K). "Soluble" means the ionic compound doesn't precipitate, while "slightly soluble" and "insoluble" mean that a solid will precipitate; "slightly soluble" compounds like calcium sulfate may require heat to precipitate.