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2024-05-03. Description. At room temperature, sodium hydroxide is a white crystalline odorless solid that absorbs moisture from the air. It is a manufactured substance. When dissolved in water or neutralized with acid it liberates substantial heat, which may be sufficient to ignite combustible materials.
Similar to the hydration of sulfuric acid, dissolution of solid sodium hydroxide in water is a highly exothermic reaction where a large amount of heat is liberated, posing a threat to safety through the possibility of splashing. The resulting solution is usually colorless and odorless.
- NaOH
- 39.9971 g/mol
- 323 °C (613 °F; 596 K)
- 418 g/L (0 °C), 1000 g/L (25 °C), 3370 g/L (100 °C)
These reactions can be hazardous and may result in flammable or toxic gas production, or generation of excessive heat that may cause pressurization to occur. Another reactive hazard is heat of mixing. Mixing substances such as sulfuric acid or sodium hydroxide with water may generate significant heat. Additionally, water is a good solvent for ...
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This page looks at the reactions of the Group 1 elements - lithium, sodium, potassium, rubidium and caesium - with water. It uses these reactions to explore the trend in reactivity in Group 1. All of these metals react vigorously or even explosively with cold water.
Jun 30, 2023 · The sodium moves because it is pushed by the hydrogen produced during the reaction. If the sodium becomes trapped on the side of the container, the hydrogen may catch fire and burn with an orange flame. The color is due to contamination of the normally blue hydrogen flame with sodium compounds.
Jun 22, 2011 · When sodium hydroxide is dissolved in water it feels warm, which indicates an exothermic reaction. NaOH (s) → Na + (aq) + OH – (aq) TOPICS COVERED: – exothermic reactions – dissolution – solubility. MATERIALS NEEDED: – 125mL Erlenmeyer flask w/ 30mL of water – 3g NaOH. PROCEDURE: 1. Add NaOHto the flask 2. Swirl to dissolve ...
Enthalpy of reaction at standard conditions Data from NIST Standard Reference Database 69: NIST Chemistry WebBook The National Institute of Standards and Technology (NIST) uses its best efforts to deliver a high quality copy of the Database and to verify that the data contained therein have been selected on the basis of sound scientific judgment.
