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  1. Molarity vs. molality (video) | Khan Academy

    Learn how molarity and molality differ! The molality of a solution is equal to the moles of solute divided by the mass of solvent in kilograms, while the molarity of a solution is equal to the …

  2. Worked examples: Calculating [H₃O⁺] and pH - Khan Academy

    In this video, we'll solve for [H₃O⁺] and pH in two different worked examples. First, we'll walk through the possible approaches for calculating [H₃O⁺] from pOH. Then, we'll find the pH of …

  3. Molarity vs. osmolarity (video) | Khan Academy

    I want to talk about the difference between the two words-- molarity, M-O-L-A-R-I-T-Y, molarity-- and a word that's very similar, osmolarity. And I'm going to do it with a little example, because I …

  4. Dilutions (video) | Molarity | Khan Academy

    The dilution equation (M1*V1) = (M2*V2) is used to calculate the molarities and volumes required for the dilution. This often starts with a concentrated stock solution, which is then diluted to …

  5. Moles and molar mass (practice) | Khan Academy

    Using the information in the table, calculate the number of moles in a 2.03 kg sample of citric acid (C A 6 H A 8 O A 7 ). Write your answer using three significant figures.

  6. How to calculate molarity (article) | Khan Academy

    You can mix a smaller amount of a liquid into a larger amount of another liquid and use molarity where the minor liquid is the solute and the major liquid is the solvent.

  7. Stoichiometry (article) | Chemical reactions | Khan Academy

    Using this ratio, we could calculate how many moles of Al are needed to fully react with a certain amount of Fe 2 O 3 , or vice versa. In general, mole ratios can be used to convert between …

  8. Molarity (video) | Solutions and mixtures | Khan Academy

    The most common way to express solution concentration is molarity (M), which is defined as the amount of solute in moles divided by the volume of solution in liters: M = moles of solute/liters …

  9. Acid–base titrations (video) | Khan Academy

    If we know the moles of our analyte and the original volume of the analyte, we can now calculate the concentration of the analyte solution in molarity that we began with which is the objective …

  10. Stoichiometry and the mole | High school chemistry (TX TEKS

    Moles and molar mass Learn how to count atoms and molecules using Avogadro's number and the mole. Use the periodic table to calculate the molar mass of a substance.