Chemistry Exam - Year 10 🙏😭🥀

{EMOJI UPDATES} Chemical Patterns, Chemical Reactions, Organic Chemistry

Metal element + oxygen = ? 🙏

Metal Oxide (Combustion)

Hydrocarbon + excess oxygen = ? 😭

Carbon Dioxide + Water (Combustion)

AB ➡ A + B 🔨

Decomposition

A + B ➡ AB 🍜

Combination

Active metal + acid ➡ ? 🧬

Salt + Hydrogen

Metal carbonate + acid ➡ ? 🎸

Salt + Water  + Carbon dioxide

Hydrochloric Acid ➡ ? 🤨

HCl

Nitric Acid ➡ 🫨

HNO₃

Sulfuric Acid ➡ 😴

H₂SO₄

Test for Carbon dioxide…?

Put a lighted splint into a sample of the gas

Test for Hydrogen…?

Put a lighted splint into a sample of the gas

Test for Oxygen…?

Put a glowing splint into a sample of the gas

What is a Precipitate…?

A solid that forms as the result of a chemical reaction in aqueous solution

What is Metal Displacement…?

When a more reactive metal displaces a less reactive metal from its salt solution or compound

What is this…? (^12₆C, ^13₆C, ¹⁴₆C)

Isotopes

Why when you go down the periodic table does the Atomic radius increases…?

Each new period adds a new electron shell

What data can we extract from ¹³₁₉ K?

The number of protons, neutrons, and electrons in an atom.

What is the electron configuration of ³⁹₁₉ K?

2,8,8,1

What period of the periodic table is ³⁹₁₉ K?

Potassium is in Period 4

How reactive is ³⁹₁₉ K?

It is very reactive

What is the charge and cation/anion of ³⁹₁₉ K

1+ Cation

What is Metallic…?

Cations surrounded by a sea of delocalised electrons

Name properties of Metallic Bonding

High Melting Point, Ductile, Malleable, Conductor

What is Metallic bonding…?

Bonding between metals

What is Ionic…?

A direct electron transfer occurring from a metal to a non metal.

What is ionic bonding…?

Bonding between ions

What is Covalent bonding…?

Bonding between Non-Metals

What does Covelant mean…?

When non-metal atoms share electrons to achieve a full valence shell

What is the cheat trick for writing ionic formula? 🥳🥹

Swap the charges between the two atoms

Properties of ionic substances…?

High Melting Point, Brittle, Hard

Properties of Covalent substances…?

Low Melting Point, Poor conductors, Can exist in all stages

Flame Test experiment learnings are…? 🔥 

Heating a salt solution, a flame colour is visible, electrons from ground state are promoted to the excited state then releases a photon in the form of light when dropping down to the ground state.

What separates the crude oil…? 🛢

Fractional distillation tower

What is volumetric analysis…? 🧪

Determine the concentration of a solution by measuring the volume of a second solution that reacts with it.

Name the Alcohol 🍻

Propan-2-ol

Name the Alcohol 🍻

Pentan-2-ol

Name the Alcohol 🍻

2,3 dimethyl pentane-3-ol

What is an “Alcohol”…? 🍺

Contains an OH group

What does an Alcohol make an Alkane do…? 🏆➡💧

Not soluble in water to soluble

How many Carbon is attached to the Central carbon in a Primary? 📕

1 Carbon

How many Carbon is attached to the Central carbon in a Secondary? 📗

2 Carbon

How many Carbon is attached to the Central carbon in a Tertiary? 📘

3 Carbon

Why is OH part of a functional group…? 💨

Because it is an atom when added to a hydrocarbon changes its chemical/physical properties

What is an isomer…? 🫣

Same formula but a different arrangement of atoms in the molecule and different properties.

What number is a “mole” or better known as Avogradros constant? 🥑

6.02×10²³

What is a solution…? 👨‍🍳

Solvent + Solute when uniformly mixed

Can light pass through a solution…? ⚡️

Yes