Calculate the concentration of the following, aqueous solutions. Give your final answer to two decimal places. Hydroxonium ions, H3O+, in a solution of pH 6.4 Calcium hydroxide, Ca(OH)2 in a solution of pH 11.5 Use the ‘oxidation number method’ and balance the unfinished, ionic equation below. SO2 (aq) + IO3- (aq) → SO42- (aq) + I- (aq) Describe how a mixture of pentanoic acid (CH3CH2CH2CH2COOH) and potassium pentanoate (CH3CH2CH2CH2COOK) in solution can act as a buffer solution.
States of Matter
The substance that constitutes everything in the universe is known as matter. Matter comprises atoms which in turn are composed of electrons, protons, and neutrons. Different atoms combine together to give rise to molecules that act as a foundation for all kinds of substances. There are five states of matter based on their energies of attraction, namely solid, liquid, gases, plasma, and BEC (Bose-Einstein condensates).
Chemical Reactions and Equations
When a chemical species is transformed into another chemical species it is said to have undergone a chemical reaction. It consists of breaking existing bonds and forming new bonds by changing the position of electrons. These reactions are best explained using a chemical equation.
- Calculate the concentration of the following, aqueous solutions. Give your final answer to two decimal places.
- Hydroxonium ions, H3O+, in a solution of pH 6.4
- Calcium hydroxide, Ca(OH)2 in a solution of pH 11.5
- Use the ‘oxidation number method’ and balance the unfinished, ionic equation below.
SO2 (aq) + IO3- (aq) → SO42- (aq) + I- (aq)
- Describe how a mixture of pentanoic acid (CH3CH2CH2CH2COOH) and potassium pentanoate (CH3CH2CH2CH2COOK) in solution can act as a buffer solution.
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