ou have been given a sample of river water and have been asked to determine the concentration of acid in the river. You decide to do a titration with potassium hydroxide. a) Using the following data that you collect from your experiment, determine the concentration of acid in the river water. b) What is the pH of the river water? c) Give one reason as to why this pH level is a concern. Mass of potassium hydroxide: 1.865 g Volume of potassium hydroxide solution: 300. mL Trial 1 Trial 2 Trial 3 Initial burette reading (mL) 0.75 15.05 30.20 Final burette reading (mL) 15.05 30.20 45.52 Volume of water from river (mL) 20.0 20.0 20.0
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.
You have been given a sample of river water and have been asked to determine the concentration of acid in the river. You decide to do a titration with potassium hydroxide.
a) Using the following data that you collect from your experiment, determine the concentration of acid in the river water.
b) What is the pH of the river water?
c) Give one reason as to why this pH level is a concern.
| Mass of potassium hydroxide: 1.865 g |
| Volume of potassium hydroxide solution: 300. mL |
| Trial 1 | Trial 2 | Trial 3 | |
| Initial burette reading (mL) | 0.75 | 15.05 | 30.20 |
| Final burette reading (mL) | 15.05 | 30.20 | 45.52 |
| Volume of water from river (mL) | 20.0 | 20.0 | 20.0 |
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