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Its solubility increases from 0.66 g/L at 100 °C to 1.89 g/L at 0 °C. [8] Its solubility product K sp of 5.02 × 10 −6 at 25 °C, [1] its dissociation in water is large enough that its solutions are basic according to the following dissolution reaction: Ca(OH) 2 → Ca 2+ + 2 OH −. The solubility is affected by the common-ion effect. Its ...
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.
Calcium hydrosulfide is the chemical compound with the formula Ca(HS) 2 or CaH 2 S 2. [1] It is formed from the reaction of calcium hydroxide or calcium carbonate with hydrogen sulfide: [2] Ca(OH) 2 + 2H 2 S → Ca(HS) 2 + 2H 2 O CaCO 3 + 2H 2 S → Ca(HS) 2 +H 2 O+CO 2
Solubility products are often expressed in logarithmic form. Thus, for calcium sulfate, with K sp = 4.93 × 10 −5 mol 2 dm −6, log K sp = −4.32. The smaller the value of K sp, or the more negative the log value, the lower the solubility. Some salts are not fully dissociated in solution.
3 / 8 S 8 + 2 H 2 O + 6 OH − → 2 S 2− + SO 2− 3 + 5 H 2 O. and after simplification, or more exactly recycling, of water molecules in the above reaction: 3 / 8 S 8 + 6 OH − → 2 S 2− + SO 2− 3 + 3 H 2 O. adding back 6 Ca 2+ cations from hydrated lime for the sake of electroneutrality, one obtains the global reaction. This last ...
Pentacalcium trialuminate, 5CaO·3Al 2 O 3 (C 5 A 3), forms only under an anhydrous and oxygen free atmosphere. The crystal is orthorhombic, with a density of 3067 kg·m −3. It reacts rapidly with water. Tetracalcium trialuminate, 4CaO·3Al 2 O 3 (C 4 A 3), is a metastable phase formed by dehydrating 4CaO·3Al 2 O 3 ·3H 2 O (C 4 A 3 H 3).
In chemistry, a strong electrolyte is a solute that completely, or almost completely, ionizes or dissociates in a solution. These ions are good conductors of electric current in the solution. Originally, a "strong electrolyte" was defined as a chemical compound that, when in aqueous solution , is a good conductor of electricity.
In chemical terms, the pozzolanic reaction occurs between calcium hydroxide, also known as portlandite (Ca(OH) 2), and silicic acid (written as H 4 SiO 4, or Si(OH) 4, in the geochemical notation): Ca(OH) 2 + H 4 SiO 4 → CaH 2 SiO 4 ·2 H 2 O. or summarized in abbreviated cement chemist notation: CH + SH → C-S-H. The pozzolanic reaction can ...