Chemistry EOY Y8

Atoms and Equations ● Definitions of elements, compounds and mixtures ● Rules for naming compounds ● Arrangement of elements in the Periodic Table ● Subatomic particles in the atom ● Word and symbols equations for chemical reactions ● History of the atom and the periodic table Metals and the Reactivity Series ● Structure of metals and alloys ● Reaction of potassium, sodium, lithium and calcium with water ● Production of alkalis by reacting metals with water ● The reactivity series of metals ● Production of salts by reacting metals with acids ● Displacement reactions of metals reacting with salt solutions ● The reaction of metals with oxygen to make oxides, and the displacement reactions of metals with metal oxides ● The extraction of metals such as copper from their ores Salts and Analysis ● Production of salts by reacting metal oxides and hydroxides (bases) with acids ● Production of salts by reacting metal carbonates with acids ● Names of salts made from sulfuric acid, hydrochloric acid and nitric acid ● Definition of salts, bases, alkalis and acids ● Testing for a carbonate using an acid and lime water ● Testing for a sulfate using barium chloride solution ● Testing for a halide (chloride, bromide or iodide) using silver nitrate solution ● Testing for the metal present in a salt using a flame test or the sodium hydroxide test

What is an element?

An element is a pure substance consisting of a single type of atom.

What is a compound?

A compound is a substance formed from two or more different types of atoms chemically bonded together.

What is a mixture?

A mixture is a combination of two or more substances that are not chemically bonded.

What are the rules for naming compounds?

Compounds are named based on the elements they contain, often with prefixes indicating the number of atoms, and typically end in -ide, -ate, or -ite depending on the composition of the compound.

How are elements arranged in the Periodic Table?

Elements in the Periodic Table are arranged in order of increasing atomic number, organized into rows called periods and columns called groups based on similar properties.

What are the subatomic particles in an atom?

Atoms are made up of three primary subatomic particles: protons (positively charged), neutrons (neutral), and electrons (negatively charged).

What is the significance of word and symbol equations in chemical reactions?

Word equations describe what occurs in a chemical reaction using the names of the reactants and products, while symbol equations use chemical formulas to convey the same information in a more concise and precise manner.

What is the history of the atom and the periodic table?

The atomic theory has evolved from early ideas of indivisible particles to Dalton's atomic model, Thomson's discovery of electrons, Rutherford's nuclear model, and Bohr's planetary model, while the periodic table has developed over time to reflect the systematic organization of elements based on their properties.

What is the structure of metals and alloys?

Metals typically have a lattice structure of positively charged ions surrounded by a sea of delocalized electrons, while alloys are mixtures of two or more metals (or a metal and a non-metal) that enhance certain properties compared to pure metals.

How do potassium, sodium, lithium, and calcium react with water?

These alkali and alkaline earth metals react vigorously with water, producing hydrogen gas and forming corresponding hydroxides.

What is the production of alkalis by reacting metals with water?

When certain metals react with water, they form metal hydroxides, which are alkaline in nature.

What is the reactivity series of metals?

The reactivity series is a list of metals arranged in order of decreasing reactivity, which ranks metals based on their ability to displace other metals from solutions and react with water and acids.

How are salts produced by reacting metals with acids?

When metals react with acids, they produce salts and hydrogen gas.

What are displacement reactions of metals reacting with salt solutions?

Displacement reactions occur when a more reactive metal displaces a less reactive metal from its compound in solution.

How do metals react with oxygen to make oxides?

When metals react with oxygen, they typically form metal oxides, which may result in different oxidation states depending on the metal.

What are the processes for extracting metals like copper from ores?

Metals can be extracted from their ores through processes such as smelting, electrolysis, and using chemical reactions to separate the metal from its compound.

How are salts produced by reacting metal oxides and hydroxides with acids?

Reacting a metal oxide or hydroxide (which are bases) with acids forms salts and water in a neutralization reaction.

How are salts produced by reacting metal carbonates with acids?

When a metal carbonate reacts with an acid, it produces a salt, carbon dioxide, and water.

What are the names of salts made from sulfuric acid, hydrochloric acid, and nitric acid?

Salts produced from sulfuric acid are sulfates, from hydrochloric acid are chlorides, and from nitric acid are nitrates.

What is the definition of salts, bases, alkalis, and acids?

Salts are the products of the reaction of acids with bases, bases are substances that can accept hydrogen ions, alkalis are soluble bases, and acids are substances that donate hydrogen ions.

How can carbonates be tested using acid?

To test for a carbonate, an acid is added to the sample; if effervescence occurs, carbon dioxide is produced, which can be confirmed with lime water, turning it cloudy.

How is a sulfate tested using barium chloride solution?

The presence of sulfate ions is indicated by the formation of a white precipitate of barium sulfate when barium chloride is added to a sulfate solution.

How is a halide tested using silver nitrate solution?

The addition of silver nitrate solution to a halide results in the formation of a precipitate specific to the halide present (white for chloride, cream for bromide, and yellow for iodide).

How is the metal present in a salt tested?

The metal in a salt can be tested using a flame test, in which the salt is heated in a flame to observe the characteristic color, or by using sodium hydroxide solution to form a precipitate.