Search results
Results From The WOW.Com Content Network
The overall chemical reaction is: CO 2 + Ca(OH) 2 → CaCO 3 + H 2 O + heat (in the presence of water) Each mole of CO 2 (44 g) reacts with one mole of calcium hydroxide (74 g) and produces one mole of water (18 g). The reaction can be considered as a strong-base-catalysed, water-facilitated reaction. [5]
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 solubility drastically decreases upon addition of hydroxide or calcium sources.
3 (s) + 3 H 2 O (g) The net reaction being: 2LiOH(s) + CO 2 (g) → Li 2 CO 3 (s) + H 2 O (g) Lithium peroxide can also be used as it absorbs more CO 2 per unit weight with the added advantage of releasing oxygen. [12] In recent years lithium orthosilicate has attracted much attention towards CO 2 capture, as well as energy storage. [8]
Ca 0 Calcium: Gas Ca 178.2 Calcium(II) ion Gas Ca 2+ 1925.90 Calcium(II) ion Aqueous Ca 2+ −542.7 Calcium carbide: Solid CaC 2: −59.8 Calcium carbonate Solid CaCO 3: −1206.9 Calcium chloride: Solid CaCl 2: −795.8 Calcium chloride: Aqueous CaCl 2: −877.3 Calcium phosphate: Solid Ca 3 (PO 4) 2: −4132 Calcium fluoride: Solid CaF 2: − ...
The reaction Ca(OH) 2 + CO 2 ⇌ Ca 2+ + HCO − 3 + OH − illustrates the basicity of calcium hydroxide. Soda lime, which is a mixture of the strong bases NaOH and KOH with Ca(OH) 2, is used as a CO 2 absorbent.
2 Al + 2 NaOH + 2 H 2 O → 2 NaAlO 2 + 3 H 2 Sodium aluminate is an inorganic chemical that is used as an effective source of aluminium hydroxide for many industrial and technical applications. Pure sodium aluminate (anhydrous) is a white crystalline solid having a formula variously given as NaAlO 2 , Na 3 AlO 3 , Na[Al(OH) 4 ] , Na 2 O·Al 2 ...
Carbonatation is a slow process that occurs in concrete where lime (CaO, or Ca(OH) 2 ) in the cement reacts with carbon dioxide (CO 2) from the air and forms calcium carbonate. The water in the pores of Portland cement concrete is normally alkaline with a pH in the range of 12.5 to 13.5.
The alkali–carbonate reaction is also catalyzed by the soluble NaOH produced by the reaction of Na 2 CO 3 with Ca(OH) 2 (portlandite) present in the hardened cement paste (HCP), therefore perpetuating the reaction indefinitely as observed by Fournier and Bérubé (2000) and Bérubé et al. (2005). [4] [5]