This reaction is sometimes used to inflate life rafts, weather balloons, and the like, where a simple, compact means of generating H 2 is desired. The water vapour released by the heating reacts with the calcium hydride and the pressure in the measuring system increases due to the developing hydrogen. Moles of CaH2 = (4.167 moles H2) x (1 mole CaH2/2 moles H2) = 2.083 moles CaH2 Calcium reacts with hydrogen gas at $300400^{\circ} \mathrm{C}$ to form a hydride. Product name : Calcium Hydride CAS-No. Add your answer and earn points. After 2 h, cool the reaction flask to room temperature (20-25°C). Calcium hydride (CaH 2) reacts vigorously with water, liberating hydrogen gas. CaH2+2H2O----Ca(OH)2+2H2. The balanced equation to this is CaH_2+2H_2O----Ca (OH)_2+2H_2 How many grams of calcium hydride are needed to form 8.400 g of hydrogen? Titanium Hydride: black metallic powder whose dust is an explosion hazard and which dissociates above 288 C; used in powder metallurgy, hydrogen production, foamed metals, glass solder, and refractories, and as an electronic gas getter. a. b. of anhydrous dioxan instead of the dioxan extract and a correction made for the small volume of gas adsorbed on the calcium hydride powder. This compound has two ionic bonds between the calcium and the two hydrogen ions, as shown in Figure 1. It is also used as a drying agent for liquids and gases. In contact with water, it releases flammable gases which may ignite spontaneously. Calcium Hydride is a highly water/moisture reactive chemical. Binary compounds of alkali metals and hydrogen react with water to liberate $\mathrm{H}_{2}(g) .$ The $\mathrm{H}_{2}$ from the reaction of a sample of NaH with an excess of water fills a volume of 0.490 L above the water. Furthermore, calcium hydride is employed as a reducing agent for metal oxides. Compare Products: Select up to 4 products. So we know that we have one mole over calcium hydrate and two miles of water. The reaction of potassium superoxide, $\mathrm{KO}_{2}$, is used in life-support systems to replace $\mathrm{CO}_{2}(\mathrm{g})$ in expired air with $\mathrm{O}_{2}(\mathrm{g}) .$ The unbalanced chemical equation for the reaction is given below.$$\mathrm{KO}_{2}(\mathrm{s})+\mathrm{CO}_{2}(\mathrm{g}) \longrightarrow \mathrm{K}_{2} \mathrm{CO}_{3}(\mathrm{s})+\mathrm{O}_{2}(\mathrm{g})$$(a) How many moles of $\mathrm{O}_{2}(\mathrm{g})$ are produced by the reaction of $88.0 \mathrm{g} \mathrm{CO}_{2}(\mathrm{g})$ with excess $\mathrm{KO}_{2}(\mathrm{s}) ?$(b) How many grams of $\mathrm{KO}_{2}(\mathrm{s})$ are consumed per$1.000 \times 10^{3} \mathrm{g} \mathrm{CO}_{2}(\mathrm{g})$ removed from expired air? Molecular Weight 42.09 . The gas pressure is proportional to the amount of water introduced, because the reaction is specific for water. Mar 20, 2016. How many grams of ethyl alcohol will result? (c) Which is the limiting reactant? Calcium hydride (CaH 2) reacts vigorously with water, liberating hydrogen gas. Calcium Hydride Oil Analysis Kit; Karl Fischer Titration; Relative Humidity Sensors; Infrared Spectroscopy; 1. #8.400 cancel("g H"_2) × ("1 mol H"2)/(2.016 cancel("g H"2)) = "4.1667 mol H"_2#. Calcium hydroxide… *Please select more than one item to compare. Business. Identify all of the phases in your answer. Calcium hydride is a convenient, portable source of hydrogen that is used, among other things, to inflate weather balloons. The molar mass of #"H"_2# is 2.016 g/mol. #4.1667 cancel("mol H"_2) × ("1 mol CaH"_2)/(2 cancel("mol H"_2)) = "2.0833 mol CaH"_2#. Molar mass of calcium hydride = 42 g/mol. First-aid measures Eye Contact Immediate medical attention is required. Water Purification Systems; ... Search term: "calcium hydride" Compare Products: Select up to 4 products. 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