Kevin 1. Problem # 1 Chlorine -35 forms 75% of the total mass of chlorine and chlorine-37 forms 25%. Calculate the relative atomic mass of chlorine. Solution Consider a sample containing about 100 atoms of chlorine: 75 atoms will each have a mass of 35, which means that their total mass will be 35 X 75 … Read more
Oxygen is an essential element for various scientific and industrial processes. In the laboratory, it is commonly prepared using a few established methods, each leveraging chemical reactions to produce this vital gas. 1. From Hydrogen Peroxide The most common method of preparing oxygen in the lab is catalytic decomposition of hydrogen peroxide. At room temperature, … Read more
Puzzle Description How many acids and bases-related terms do you remember? How many can you spot in the word search puzzle below? Reinforce your knowledge with this fun and engaging word search puzzle on acids and bases. Useful Resources
Worksheet Description The most reliable method for determining whether a substance is acidic or basic is by using acid-base indicators or pH indicators. The worksheet tests students’ knowledge of the pH scale and pH indicators (natural, commercial, and universal). Useful Resources Natural, Commercial, & Universal pH Indicators
Worksheet Description This worksheet evaluates students’ comprehension of the definitions of acids and bases, fundamental properties of acids and bases, and their various uses. Upon completion of the simple but engaging exercises in the worksheet, students will deepen their understanding of the fundamentals of acids and bases. Useful Resources
Worksheet Description Heating and cooling curves are often used to depict the temperature changes of substances as heat is added or removed over time. This worksheet seeks to link how the temperature of substances changes during heating or cooling processes while undergoing phase transitions, such as melting, boiling, and freezing. Useful Resources Heating and Cooling … Read more
Worksheet Description The kinetic theory of matter is a scientific concept that is often used to understand the behavior of matter, especially with respect to the motion of its constituent particles. This worksheet tests whether students can explain the behavior of matter in various states as well as transitions or changes of state using the … Read more