How much heat is released when 9.16 grams of solid calcium hydroxide is added to 293 mL of 7.5 M HNO3?
2007-11-28 05:08:12 · 3 answers · asked by io 1 in Science & Mathematics ➔ Chemistry
7.5 M solution contains 7.5 moles of solute per liter of solution. Thus, you have (7.5 mol/L)*(0.293 L) = 2.1975 moles of HNO3. The molar mass of Ca(OH)2 is 74.093 g, so you have only (9.16 g) / (74.093 g/mol) = 0.1236 mol of Ca(OH)2, making it the limiting reagent.
The chemical reaction is
2HNO3 (aq) + Ca(OH)2 = Ca(NO3)2 + 2H2O + heat
You're going to need to look up that heat yourself, and then multiply it by 0.1236. Your answer is going to be in units of energy, like joules or calories, not in units of temperature like degrees Fahrenheit.
2007-11-30 05:13:44 · answer #1 · answered by DavidK93 7 · 0⤊ 0⤋
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2016-09-30 06:36:57 · answer #2 · answered by glassburn 4 · 0⤊ 0⤋
70 F i think
2007-11-28 05:17:08 · answer #3 · answered by ooops1970 2 · 0⤊ 1⤋