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It consists of calcium cations (Ca 2+) and chloride (Cl −) and hydroxide (− OH) anions. A white solid, it forms by the reaction of hydrogen chloride with calcium hydroxide [3] According to X-ray crystallography, it adopts a layered structure related to brucite (magnesium hydroxide, Mg(OH) 2). [4]
Calcium hydroxide reacts with hydrochloric acid to give calcium hydroxychloride and then calcium chloride. In a process called sulfation, sulphur dioxide reacts with limewater: Ca(OH) 2 (aq) + SO 2 (g) → CaSO 3 (s) + H 2 O (l) Limewater is used in a process known as lime softening to reduce water hardness. It is also used as a neutralizing ...
When dissolved in water, calcium chloride can undergo hydrolysis, especially over time, which can lead to the formation of small amounts of hydrochloric acid and calcium hydroxide: Ca + 2 +2 H 2 O ⇌ Ca(OH) 2 +2 H +. This reaction can lower the pH of the solution, making it more acidic. [68] Acidic solutions may harm plant tissues and disrupt ...
Calcium hypochlorite is an inorganic compound with chemical formula Ca(Cl O) 2, also written as Ca(OCl) 2.It is a white solid, although commercial samples appear yellow. It strongly smells of chlorine, owing to its slow decomposition in moist air.
The Ca/P ratio is often used in the discussion of calcium phosphate phases. [14] Stoichiometric apatite Ca 10 (PO 4) 6 (OH) 2 has a Ca/P ratio of 10:6 normally expressed as 1.67. The non-stoichiometric phases have the hydroxyapatite structure with cation vacancies (Ca 2+) and anion (OH −) vacancies.
Density: 2.2 g cm −3 [2] Solubility in H 2 O 0.160 20 g/100 g [2] pH (at 20 °C) ... -985.2 kJ/mol [4] Standard molar entropy, S o solid: 83.4 J/(mol K) [4] Heat ...
The tetrahydrate crystallizes as a solid solution of Ca 3 (SO 3)2(SO 4). 12H 2 O and Ca 3 (SO 3)2(SO 3). 12H 2 O. The mixed sulfite-sulfate represents an intermediate in the oxidation of the sulfite to the sulfate, as is practiced in the production of gypsum. This solid solution consists of [Ca 3 (SO 3) 2 (H 2 O) 12] 2+ cations and either ...
The reaction of CaH 2 with water can be represented as follows: CaH 2 + 2 H 2 O → Ca(OH) 2 + 2 H 2. The two hydrolysis products, gaseous H 2 and Ca(OH) 2, are readily separated from the dried solvent. Calcium hydride is a relatively mild desiccant and, compared to molecular sieves, probably inefficient. [7]