Cacl2

I'm not quite sure I understand this. My question is: Calcium chloride is a salt used widely to melt ice on sidewalks and roads. Explain why one mole of $\ce$ would be more effective for the melting, because calcium chloride dissociates into three ions and sodium chloride dissociates into two, so that would make the boiling point of water with calcium chloride higher. Therefore, it shouldn't be used to melt ice over sodium chloride, as it would make the water have a higher boiling point so wouldn't melt it as well! $\begingroup$ It's a little weird that you're trying to justify changes in the melting point by looking at the effects of dissolved substances on the boiling point. If you have a book around, take a quick look again at freezing point depression (or cryoscopic effect) and compare it with the boiling point elevation (or ebulioscopic effect). In particular, notice how the equations are very similar. What does this similarity imply? $\endgroup$ That one mole of $\ce$ is widely used as melting agent may have more to do with keeping the concrete intact. Concrete is composed of many calcium-containing species. When water flows over the concrete, the calcium can be leeched out, and the concrete becomes brittle. The higher the calcium content in the water, the less leeching occurs, and the concrete remains structurally sound. $\begingroup$ More specifically, you're talking about the enthalpy change of solution. For NaCl, this quantity is slightly positive, about 3.87 kJ/...

CAS 10043-52-4 Molecular Formula CaCl2 Molecular Weight (g/mol) 110.98 MDL Number MFCD00010903 InChI Key UXVMQQNJUSDDNG-UHFFFAOYSA-L Synonym calcium chloride, calcium dichloride, calcium chloride anhydrous, calcium ii chloride, calciumchloride, caloride, liquical, calcium chloride pellets, isocal, jarcal PubChem CID ChEBI SMILES [Cl-].[Cl-].[Ca++] This Thermo Scientific Chemicals brand product was originally part of the Acros Organics product portfolio. Some documentation and label information may refer to the legacy brand. The original Acros Organics product / item code or SKU reference has not changed as a part of the brand transition to Thermo Scientific Chemicals. Boiling Point >1600.0°C Melting Point 782.0°C Color White Physical Form Powder Quantity 25 g Assay Percent Range 95% min. (Complexometry) Linear Formula CaCl 2 Fieser 01,104; 04,368 Merck Index 15,1661 Solubility Information Solubility in water: 740g/L (20°C). Other solubilities: freely soluble in alcohol IUPAC Name calcium dichloride Formula Weight 110.99 Percent Purity 96% Grade Extra Pure Packaging Plastic bottle Chemical Name or Material Calcium chloride, 96% GHS H Statement: Causes serious eye irritation. GHS P Statement: IF SWALLOWED: Call a POISON CENTER or doctor/physician if you feel unwell. Wear protective gloves/protective clothing/eye protection/face protection. IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. WARNING:...

• 1/Ca.2ClH/h;2*1H/q+2;;/p-2 UXVMQQNJUSDDNG-NUQVWONBAG EV9800000 性质 CaCl 2 110.98 g/mol（无水） 128.999 g/mol（一水合物） 147.014 g/mol（二水合物） 183.045 g/mol（四水合） 219.08 g/mol（六水合物） g·mol⁻¹ 外观 白色粉末 易 无臭 2.15 g/cm 3（无水） 1.835 g/cm 3（二水合物） 1.83 g/cm 3（四水合物） 1.71 g/cm 3（六水合物） 772 °C（无水） 260 °C（一水合物） 176 °C（二水合物） 45.5 °C（四水合物） 30 °C（六水合物） 1935 °C (无水) 317.6 74.5 g/100mL (20 °C) 59.5 g/100 mL (0 °C) 溶于 K a 8-9（无水） 6.5-8.0（六水合物） n D 1.52 结构 Pnnm, No. 58 危险性 目录 • 1 化学及物理性质 • 2 制备 • 3 分布 • 4 应用 • 4.1 干燥剂 • 4.2 医学和生物学的应用 • 4.3 除冰剂和冷却浴 • 4.4 钙离子的来源 • 4.5 食品 • 4.6 其他方面 • 5 毒物学 • 6 参考文献 化学及物理性质 [ ] 氯化鈣可溶于水，故可作为溶液中钙离子来源。此性质使它能用于置换溶液中的某些特定离子。如溶液中的 3CaCl 2(aq) + 2K 3PO 4(aq) → Ca 3(PO 4) 2 (S) + 6KCl (aq) CaCl 2 → Ca(s) + Cl 2(g)↑ 氯化钙的 氯化钙溶液能诱导 对1 2+和Cl -与水分子之间存在水合作用，但六水合氯化钙作为晶态固体具有的长程有序结构变成液态后未完全打破。 2+被三个分别处在(u,O,O), (0,u,0)和( u ¯ )，它们距离钙离子约2.7Å，这六个水分子沿c轴方向形成Ca—H 2O—Ca的长链，链上两个相邻Ca 2+间的距离约4Å；Cl -置于两条平行链之间，每个氯离子周围有六个水分子，其中三个水分子与氯离子间的距离约3.2Å，余下三个与氯离子间的距离约3.6Å。 制备 [ ] 它是制备 Ca(OH) 2 + 2 NH 4Cl → CaCl 2 + 2 NH 3 + 2 H 2O 亦可由 CaCO 3(s) + 2 HCl(aq) → CaCl 2(aq) + CO 2(g) + H 2O (l) 北美地区2002年的氯化钙消费量达到168.7万吨 分布 [ ] 二水合氯化钙构成了稀有的 3 应用 [ ] 干燥剂 [ ] 颗粒状的无水氯化钙常作为 2·4C 2H 5OH和氨合物CaCl 2·8NH 3 将无水氯化钙铺撒在沙石路面上，利用无水氯化钙的吸湿性在空气 医学和生物学的应用 [ ] 在 2配制用于被分离的 2进行脑片制备实验 2进行串联标记实验等 在将目的基因导入 通过 除冰剂和冷却浴 [ ] 参见： 氯化钙能降低水的 氯化钙溶液也能和干冰混合后配制低温 钙离子的来源 [ ] 游泳池水中添加氯化钙可以使池水成为pH缓冲溶液同时增加池水 在海洋水族馆的水中加入氯化钙能增加水中 食品 [ ] 作为一种食品配料，氯化钙可起到多价螯合剂和固化剂的作用，它已被 氯化钙作为 在缺乏 其他方面 [ ] 水合氯化钙固体可作为相变储能材料使用。比如六水合氯化钙由于熔点为30℃、 氯化钙在混凝土中起到帮助加快初始设定的效果，但氯离子会引起钢筋腐蚀，所以氯化钙...

Calcium Chloride Calcium chloride solution, magnesium sulfate solution, trace metal solution, and dextrose solution From: Biopharmaceutical Processing, 2018 Related terms: • Alginate • Copolymer • Ethylene • Indium • Polypropylene • Polytetrafluoroethylene • Polyvinyl Chloride • Propylene • Polycarbonate P.-C. Aïtcin, in Science and Technology of Concrete Admixtures, 2016 19.4.2Mode of addition Calcium chloride is commercially available under three different forms: two solid forms and one liquid. Calcium chloride can be bought in the form of flakes containing 77–80% of calcium chloride or granules containing 94% of calcium chloride. In its liquid form, it contains from 30% to 42% of calcium chloride per liter of solution, usually sold as 30% solution. From a practical point of view, the ACI Manual of Concrete Practice (Committee 212) recommends the introduction of liquid calcium chloride in the water line in order to avoid direct contact between cement and calcium chloride that could cause a flash set. When flakes or granules of calcium chloride are introduced directly in the mixer, these flakes and granules have not always enough time to dissolve during the mixing of concrete. Undissolved calcium chloride may generate undesirable dark spots on concrete surface. R.C. Ropp, in Encyclopedia of the Alkaline Earth Compounds, 2013 Calcium Chloride Calcium chloride, CaCl 2, is a typical ionic halide and is a solid at room temperature. Its molecular weight is 110.98g/mol and its ...