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Learn about the properties of acids, bases, pH, and buffers in this comprehensive guide from Khan Academy.
Khan Academy
Learn about pH, pOH, and the pH scale in this Khan Academy chemistry lesson.
Khan Academy
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Strong acid solutions - Khan Academy
The concentration of H₃O⁺ in a strong acid solution is therefore equal to the initial concentration of the acid. For example, a solution of 0.1 M HNO₃ contains 0.1 M H₃O⁺ and has a pH of 1.0.
Weak acid equilibrium (video) | Khan Academy
Quick overview of Ka and pKa. Example of calculating the pH of a weak acid solution.
Acid base neutralisation reaction (video) | Khan Academy
Reaction of acids and bases with metals. Reaction of acids with metal carbonates and bicarbonates. Identifying the gas released. Detection of gases. Acid base neutralisation reaction. Identify the salt formed. Overview: Reactions of acids and bases. Metal and non-metal oxides, reacting with acids and bases.
可汗学院 - Khan Academy
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Hypotonic, isotonic, and hypertonic solutions (tonicity)
Cells react differently in hypotonic, isotonic, and hypertonic solutions. In a hypotonic solution, water rushes into the cell causing it to expand or even burst. In an isotonic solution, there is no net flow of water, keeping the cell stable. In a hypertonic solution, water leaves the cell, causing it to shrivel. These reactions are due to the semipermeable nature of cell membranes and the ...
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