Notes from Chemistry Final Coaching

Introduction

• Apologies for the earlier disruptions.
• We're now at Level 1 free intensive final coaching for chemistry, Set 2.
• There are three sets and two special sets.
• Set 2 today, Set 3 tomorrow.
• Compendium and macboards are available.
• We will tackle 35 items tonight.

Requirements

• Bring pens, pencils, and paper.
• Submit scores afterwards.

Discussed Items

Item 1: Titration

• Determining the volume of solution equivalent to the mass of pure substance.
• Answer: Titration.
• Technical term: Volumetric analysis.

Item 2: Pauli's Exclusion Principle

• No more than 2 electrons can occupy the first orbital.
• Answer: Pauli's Exclusion Principle.

Item 3: Non-metallic Material

• Answer: The oxides form acid solution with water.

Item 4: Yellow Solid Substance

• Changes to violet gas when heated, reverts to yellow.
• Answer: Element, it is sulfur.

Item 5: Neutrons

• Discovered by James Chadwick.

Item 6: Spectroscope

• Instrument used to identify elements by wavelength.
• Answer: Spectroscope.

Item 7: First Nuclear Reactor

• Built in 1942 by Enrico Fermi, called Chicago Pile 1.

Item 8: Bromine Atom

• Gains an electron, becomes a negative ion.
• Answer: Negative ion.

Item 9: Periodic Law

• Properties are periodic functions of atomic number.
• Answer: Atomic number.

Item 10: Geiger-Muller Counter

• Instrument for detecting radioactivity.
• Answer: Geiger-Muller counter.

Item 11: Electromagnetic Forces

• Responsible for holding electrons to their atoms.
• Answer: Electromagnetic.

Item 12: Weak Nuclear Force

• For processes involving slow decay.

Item 13: Smell of Rotting Fish

• Result of amine compounds.

Item 14: Decomposition by Heating

• Potassium chlorate can be decomposed by heating.

Item 15: Mixture Classification

• Foams, salts, emulsions belong to colloidal dispersions.

Item 16: Particle Carriers

• Weak interactions identified by Carlo Rubia and Simon van der Meer are W and Z particles.

Item 17: Leptons

• Particles include electron, muon, and tau.

Item 18: Incineration

• Process of reducing chemicals to ashes.

Item 19: Octet Rule

• Krypton has an octet.

Item 20: Milk of Magnesium

• Classified as a basic substance (pH 10.5).

Item 21: Group Classification of Acids

• Muriatic acid does not belong to weak acids group.

Item 22: Deuterium

• Isotope of hydrogen with one proton, one neutron, and one electron.

Item 23: Ozone

• Allotropic form of oxygen.

Item 24: Compressed Gaseous Substance

• Results in decrease in distance between particles.

Item 25: Decomposition Substance

• Potassium chlorate can be decomposed by heating.

Item 26: Loss of Electron in Potassium

• Becomes K+.

Item 27: Dialysis

• Separation of substances through a differentially permeable membrane.

Item 28: Sodium Atom Loss of Electron

• Becomes positive ion.

Item 29: Haber Process Catalyst

• Iron is used as a catalyst.

Item 30: Alloys

• Substance composed of two or more metals is called an alloy.

Item 31: Gaseous Molecules Compressed

• Decrease in volume occurs.

Item 32: Fermentation Process

• Action of enzymes breaks down organic compounds.

Item 33: Principal Components of Food

• Minerals are essential components.

Item 34: Spaces Between Molecules

• Proved by compressibility of gases.

Item 35: Solubility Factor

• Temperature contributes to solubility.

Item 36: Mixture vs Compound

• Mixture is a combination of two substances in any proportion.

Closing

• Submit scores to ComSec.
• Good night and keep studying!
• See you tomorrow for Set 3!