Question

State three physical and three chemical properties of alkali metals

Answer 1

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Alkali metals are soft solids and can be easily cut. Alkali metals have low densities as compared to heavy metals such as iron and copper. Alkali metals are good conductors of heat and electricity. Alkali metals have low melting and boiling points as compared to heavy metals such as copper and iron.

Answer 2

Answer:

All alkalis have a pH greater than 7 and make hydroxide ions in water. and universal indicator will turn blue or purple. All alkalis react with acids to form a salt and water, see neutralisation.Alkalis are all Arrhenius bases, ones which form hydroxide ions (OH−) when dissolved in water. Common properties of alkaline aqueous solutions include: Moderately concentrated solutions (over 10−3 M) have a pH of 7.1 or greater. This means that they will turn phenolphthalein from colorless to pink.