Chemical Reactions Flashcards

Flashcards for Chemical Reactions Test Revision

What are the products in the equation: C3H8 + 5O2 → 3CO2 + 4H2O?

3CO2 and 4H2O

What is the generalized word equation for a combustion reaction?

Hydrocarbon + oxygen → carbon dioxide + water

What are the products in the equation: C3H8 + 5O2 → 3CO2 + 4H2O?

3CO2 and 4H2O

What is the generalized word equation for a combustion reaction?

Hydrocarbon + oxygen → carbon dioxide + water

In the equation 2H2(g) + O2(g) → 2H2O(l), what is the state of the oxygen?

Gas

Which metal reacts with acids but not water?

Magnesium

Which of the following is NOT a common type of mineral formed by reactive metals?

Bromides

Which metals are extracted using electrolysis of their molten ore?

Highly reactive metals

What does a chemical equation show?

The chemical formulas of the reactants and the products.

In electrolysis, what is the negative electrode called?

Cathode

Heating a metal sulfide in the presence of oxygen is the main step in which metal extraction method?

Roasting

In a chemical reaction, how does the total mass of the products compare to the reactants?

The same

Mineral vs. Ore

A naturally occurring, inorganic solid with a specific chemical composition and crystal structure, while an ore is a naturally occurring rock or sediment that contains one or more valuable minerals that can be economically extracted.

Reactivity order of metals

Least to Most Reactive: platinum, manganese, aluminium, potassium

Smelting Process for removing a metal from its carbonate compound

Smelting involves heating the metal carbonate (MCO3) to high temperatures, causing it to decompose into the metal oxide (MO) and carbon dioxide (CO2). The metal oxide is then reduced using a reducing agent (like carbon) to obtain the pure metal (M).

Mg(s) + O2(g) → MgO(s) - Balanced?

Unbalanced: There is one Mg atom on the reactant side and one Mg atom on the product side. There are two O atoms on the reactant side and only one O atom on the product side. Word Equation: Magnesium (solid) + Oxygen (gas) → Magnesium Oxide (solid)

Word equation for C3H8(g) + 5O2(g) → 3CO2(g) + 4H2O(g)

Word Equation: Propane (gas) + Oxygen (gas) → Carbon Dioxide (gas) + Water (gas) Reaction Type: Combustion

Balanced chemical equation: Na + H2O → NaOH + H2

2Na + 2H2O → 2NaOH + H2

Metallic product in: 2Al2O3 → 4Al + 3O2

Aluminium

Is 2Al2O3 → 4Al + 3O2 balanced?

Yes, the equation is balanced. There are 4 Al atoms and 6 O atoms on both sides of the equation.

Why is electrolysis used for Aluminum extraction?

Aluminium is extracted using electrolysis because it is a highly reactive metal.

Word equation and balanced chemical equation for combustion of methane (CH4)

Word Equation: Methane + Oxygen → Carbon Dioxide + Water Chemical Equation: CH4 + 2O2 → CO2 + 2H2O

Name the acid, metal, and salt in the reaction: 2HCl(aq) + Mg(s) → MgCl2(aq) + H2(g)

Acid: Hydrochloric acid (HCl) (aqueous) Metal: Magnesium (Mg) (solid) Salt: Magnesium chloride (MgCl2) (aqueous)

Benefits of acrylic paints over solvent-based paints

Acrylic paints use water as a solvent instead of the harmful solvents found in solvent-based paints. This protects users from inhaling toxic fumes and reduces the release of harmful volatile organic compounds (VOCs) into the atmosphere, minimizing environmental impact.

How do acrylic paints differ from solvent-based paints?

Acrylic paints use water as a solvent, whereas solvent-based paints use organic solvents.

Principles of a circular economy in packaging and processing

The principles of a circular economy emphasize reducing waste, reusing materials, and recycling goods to minimize environmental impact and maximize resource utilization.

The elements or compounds entering into a chemical reaction are called__.

Reactants

The elements or compounds produced by a chemical reaction are called__.

Products

A chemical equation showing the same number of each kind of atom on both sides of the equation is said to be __.

Balanced

A rapid reaction between oxygen and a fuel is known as __.

Combustion

The decomposition of a compound by an electric current is called __.

Electrolysis

An equation in which the reactants and products in a chemical reaction are represented by words is called __ equation.

Word equation