What is ppm? Parts per million (ppm) refers to the number of parts a certain molecule or compound makes up within the one million parts of the whole solution. It is typically used to describe concentrations of chemicals dissolved in a solvent (usually water) or compounds in soil.
Why salt bridge is used in electrochemical cell? Explain. Salt bridges are used in electrochemical cells. If salt bridge is not present in an electrochemical cell, the number of cations and anions increases. This is why the flow of electricity gets hindered and decreased. The flow of electricity will stop in case the process is … Read more
What do you mean by universal signs? Chemicals are labeled with necessary symbols according to their classes to store or distribute them. As a result, a user can easily know about the chemical from its symbol. These symbols are called harmonized signs. All of the countries in the world use these signs for the same … Read more
What kind of substance is color? Color is not a substance in the traditional sense. It is a perception that is created by the brain when light of different wavelengths is reflected or absorbed by objects. The different wavelengths of light correspond to different colors, so when an object absorbs some wavelengths of light and … Read more
Why is chemistry called central branch of science? Chemistry is called the central science because it is the foundation of many other scientific disciplines. It is the study of the composition, structure, and properties of matter, and the changes that matter undergoes during chemical reactions. This knowledge is essential for understanding the physical world around … Read more
Difference between Mixture and Compound The following difference between Mixture and Compound are given below: No. Mixture Compound 1 It contains two or more substances. It is a single substance. 2 The composition can vary. The composition is always the same 3 No chemical change takes place when a mixture is formed When a new … Read more
Difference between Orbit and Orbital The following difference between Orbit and Orbital are given below: No. Orbit Orbital 1 Its concept is established based on the quantum theory. This is established based on wave mechanics. 2 It expresses the two-dimensional way of a shell. It expresses three dimensional way of a shell. 3 According to … Read more
Difference between molar solution and molal solution The following difference between molar solution and molal solution: No. Molar Solution Molar Solution 1 Molar solution is moles of solute dissolved in 1 litre of solution. Molal Solution is moles of solute dissolved in 1 kg of solvent. 2 It’s concentration is denoted by M. It’s … Read more