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Chemical reactions can result in a change in temperature. Give criteria in terms of temperature changes for exothermic and endothermic reactions. What is the purpose of this D-shaped ring at the base of the tongue on my hiking boots? Posted 7 years ago. 2K (s) +2H 2 O (l) 2KOH (aq) +H 2 (g) 5. Which one is nitric Acid, HNO3 by itself, or when it is included in H2O? The major hazard posed by it is chemical burns, as it carries out acid hydrolysis with proteins (amide) and fats (ester), which consequently decomposes living tissue (e.g. Why are trials on "Law & Order" in the New York Supreme Court? Dilute nitric acid and copper reaction | Cu + HNO 3 = Cu (NO 3) 2 + NO + H 2 O Dilute nitric acid reacts with copper and produce copper nitrate ( Cu (NO 3) 2 ), nitric oxide (NO) and water as products. The best answers are voted up and rise to the top, Not the answer you're looking for? More able students should be encouraged to appreciate that although these experiments demonstrate gain or loss of energy to or from the surroundings, chemists are more interested in the loss or gain of energy by the chemicals themselves. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. 3. of dilute nitric acid. Gen Chem Lab Final Flashcards | Quizlet Magnesium ribbon, Mg(s) see CLEAPSSHazcard HC059a. Word equation: Nitric acid + Potassium hydroxide Potassium nitrate + water . Industrially, highly concentrated nitric acid is produced by dissolving additional nitrogen dioxide in 68% nitric acid in an absorption tower. Dilute sulfuric acid, H2SO4(aq) see CLEAPSSHazcard HC098a and CLEAPSSRecipe Book RB098. His method produced nitric acid from electrolysis of calcium nitrate converted by bacteria from nitrogenous matter in peat bogs. Samir the diagram says the heat is absorbed. For example, one source which gives the enthalpy change of neutralization of sodium hydroxide solution with HCl as -57.9 kJ mol-1: Reaction Start temp ( C) End temp (C) Change in temp (C) Endo or exo?