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  1. Sodium Hydroxide | NaOH or HNaO | CID 14798 - structure, chemical names, physical and chemical properties, classification, patents, literature, biological activities, safety/hazards/toxicity information, supplier lists, and more.

    • Overview
    • Using the pH Strips
    • Knowing What to Test

    If you’re interested in testing the alkalinity or acidity of a liquid, you can use pH strips to help you determine the pH level. If you’ve never used a pH strip, though, it might look like just a plain strip of paper, and the colorful chart looks like something you’d see in art class. Luckily, once you understand how the color coding works, reading...

    Make sure your strips test the range you need.

    The pH scale covers a range of 14 numbers, where 7 is neutral. Lower numbers are more acidic, while higher numbers are more alkaline. Some strips only test a portion of that spectrum, so make sure the strips you buy cover the pH levels you want to test for.

    Read the box to determine how long to leave the strips in.

    Some test strips only need to be left in the test liquid for about a second, while others need about 20 seconds to produce a reading. Be sure to read the instructions to ensure that your reading will be accurate.

    Dip one end of the test strip in the substance you want to test.

    You don’t need to submerge the whole strip in the test substance. Hold the strip at one end and dip the other end in the liquid, then remove it after the appropriate length of time.

    Test your tap water to make sure it’s acid neutral.

    Water is neutral, meaning it should have a pH balance of 7. Most drinking water falls in the range of 6.5-8.5. Test your drinking water to see if it falls within this range. If it isn't, there may be a contaminant in your water supply.

    A pH meter is a quick, easy way to test this. Once you put the device in your sample, the meter will tell you what the exact pH is.

    Keep your swimming pool balanced by testing the pH levels.

    A swimming pool should stay at a pH balance of between 7.4 and 7.6. Add a product made with soda ash if the pool is below 7.4 and muriatic acid if it’s above 7.6.

    Test the pH levels in your aquarium if you have one.

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  2. An easy way to test for pH is to put a drop of deionized water on your soap and then dip a pH strip in the soap solution that forms. If your soap pH is between 7-10, it is safe to use and touch. If your pH is above 10, there is still too much unreacted sodium hydroxide and it will be unsafe to touch.

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  4. sodium hydroxide, caustic soda, sodium hydrate, white caustic, soda lye, aetznatron, ascarite, sodium hydroxide na oh, sodium hydroxide solution, soda, caustic: PubChem CID: 14798: ChEBI: CHEBI:32145: IUPAC Name: sodium;hydroxide: SMILES [OH-].[Na+]

  5. Physical properties. Pure sodium hydroxide is a colorless crystalline solid that melts at 318 °C (604 °F) without decomposition and boils at 1,388 °C (2,530 °F). It is highly soluble in water, with a lower solubility in polar solvents such as ethanol and methanol. [14] Sodium hydroxide is insoluble in ether and other non-polar solvents.

    • 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)
  6. Formula: HNaO. Molecular weight: 39.9971. IUPAC Standard InChI:InChI=1S/Na.H2O/h;1H2/q+1;/p-1 Copy. IUPAC Standard InChIKey:HEMHJVSKTPXQMS-UHFFFAOYSA-M Copy. CAS Registry Number: 1310-73-2. Chemical structure: This structure is also available as a 2d Mol file or as a computed 3d SD file The 3d structure may be viewed using Java or Javascript .

  7. Cation tests using sodium hydroxide - Creative Chemistry. Learning outcomes. After studying this page, you should be able to: describe how to test for metal ions and ammonium ions, NH 4+. recall the metal hydroxide colours for these ions: copper (II), Cu 2+. iron (II), Fe 2+. iron (III), Fe 3+. chromium (III), Cr 3+. aluminium, Al 3+.

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