1. Carbon dioxide gas reacts with water to form carbonic acid. The presence of the carbonic acid is indicated by a color change using bromothymol blue indicator. You do not need to account for the color change reaction. Write the symbolic form of this chemical reaction. Note that the hydrogen in hydrogen carbonate behaves like a metal and takes a +1 charge. Classify this chemical reaction and write the general form of this type of reaction. Where did the carbon dioxide for this reaction come from? Why do you think we needed to use the color indicator to observe the presence of a reaction?
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.
1. Carbon dioxide gas reacts with water to form carbonic acid. The presence of the carbonic acid is indicated by a color change using bromothymol blue indicator. You do not need to account for the color change reaction.
- Write the symbolic form of this
chemical reaction . Note that the hydrogen in hydrogen carbonate behaves like a metal and takes a +1 charge. - Classify this chemical reaction and write the general form of this type of reaction.
- Where did the carbon dioxide for this reaction come from?
- Why do you think we needed to use the color indicator to observe the presence of a reaction?
2. Aqueous hydrogen peroxide (dihydrogen dioxide) decomposes to form liquid water (dihydrogen monoxide) and oxygen gas. A mixture of yeast will be used as a catalyst for the reaction. Note that a catalyst increases the
Write the symbolic form of this chemical reaction. Remember, the yeast is just a catalyst and does NOT appear in the reaction equation
- Classify this chemical reaction and write the general form of this type of reaction.
- What could we do to verify that the gas released was, in fact, oxygen?
- This reaction also produces a fair amount of heat energy. Why do you think this happens?
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