Le Chatelier's Principle states that when a system in equilibrium is disturbed, it will shift to counteract the disturbance. In an aqueous solution, this means that if you change the concentration of reactants or products, the system will adjust to restore equilibrium. For example, if you add more reactants, the system will shift to produce more products to balance it out.
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Hexane is a nonpolar solvent that helps extract nonpolar compounds, such as halogens, from an aqueous solution. By adding hexane, the halogens will preferentially dissolve in the nonpolar layer, allowing for easier separation and purification of the halogens from the aqueous solution.
An aqueous solution of borax is basic in nature. When litmus paper is dipped into the solution, it will turn blue or remain blue, indicating that it is a base. Litmus paper changes color in response to the pH level of the solution it is placed in.
Acids are substances that release hydrogen ions in solution, lowering the pH. Bases are substances that release hydroxide ions in solution, increasing the pH. Buffers are solutions that resist changes in pH when an acid or base is added, helping to maintain a stable pH.
HCl gas is not an acid because it does not produce H+ ions in solution when dissolved in water. However, when HCl gas dissolves in water to form hydrochloric acid (HCl aqueous), it dissociates into H+ and Cl- ions, making it acidic.
Yes, dissolving sodium chloride in water is considered a physical change. This is because only the state of matter changes (solid to aqueous solution), and no new substance is formed.