Grade 10 chemistry 2025
Acid - ansAcids are molecules that contain hydrogen atoms in combined form. It ionizes and releases hydrogen
ions when dissolved in water.
Anions - ansIons that has negative charges
Bases - ansBases are molecules that usually contain hydroxide ion combined with a metal ion. When it
dissolves in water, D disassociate and release hydroxide ions.
Binary acids - ansCompounds formed when hydrogen combines with a non-metal ion.
Binary compounds - ansCompound that consists of only two elements.
Bromothymol blue - ansAcid: yellow
Base: blue
Cations - ansIons that have positive charges
Chemical change - ansA new substance is formed.
Chemical properties of acids - ansReacts with metals to produce hydrogen gas. Reacts with carbonate to
produce carbon dioxide.
Can neutralize bases.
Chemical properties of bases - ansReacts with Grease.
Corrosive.
Reacts with proteins to break them down.
Can neutralize acid's by making it less acidic.
, Combining capability (valence) - ansThe number of electrons and elements needs to gain or lose (for ionic
compounds) or share (for molecular compounds) to become stable.
Combustion reaction - ansA type of reaction that occurs when hydrocarbon reacts with oxygen gas to produce
carbon dioxide and water. It is also known as burning.
Complete combustion - ansIf there is enough oxygen, hydrocarbon burn completely to release the energy they
contain. The only products of complete combustion are carbon dioxide and water. During complete
combustion you'll burn cleanly with no Sooty residue
Covalent bond - ansA shared pair of electrons held between two non-metal Atoms
Decomposition reaction - ansA type of reaction that involves the splitting of a large molecule into smaller
molecules or elements.
Diatomic molecules - ansA molecule consisting of only two atoms of either the same or different elements.
Double displacement reaction - ansA type of reaction that involved to compound as reactants. It occurs when
the elements in the different compounds exchange places.
Electrolytes - ansSubstances that can dissolve in water to produce a solution that can conduct electricity
How to tell chemical change? - ansPrecipitate, change in color, gas formed, heat and light, and difficulty to
reverse change.
Incomplete combustion - ansWhen insufficient oxygen is available, sometimes incomplete combustion occurs.
The products would be carbon monoxide gas and carbon (soot) in addition to carbon dioxide and water.
Incomplete combustion can be indicated by a orange flickering flame.
Acid - ansAcids are molecules that contain hydrogen atoms in combined form. It ionizes and releases hydrogen
ions when dissolved in water.
Anions - ansIons that has negative charges
Bases - ansBases are molecules that usually contain hydroxide ion combined with a metal ion. When it
dissolves in water, D disassociate and release hydroxide ions.
Binary acids - ansCompounds formed when hydrogen combines with a non-metal ion.
Binary compounds - ansCompound that consists of only two elements.
Bromothymol blue - ansAcid: yellow
Base: blue
Cations - ansIons that have positive charges
Chemical change - ansA new substance is formed.
Chemical properties of acids - ansReacts with metals to produce hydrogen gas. Reacts with carbonate to
produce carbon dioxide.
Can neutralize bases.
Chemical properties of bases - ansReacts with Grease.
Corrosive.
Reacts with proteins to break them down.
Can neutralize acid's by making it less acidic.
, Combining capability (valence) - ansThe number of electrons and elements needs to gain or lose (for ionic
compounds) or share (for molecular compounds) to become stable.
Combustion reaction - ansA type of reaction that occurs when hydrocarbon reacts with oxygen gas to produce
carbon dioxide and water. It is also known as burning.
Complete combustion - ansIf there is enough oxygen, hydrocarbon burn completely to release the energy they
contain. The only products of complete combustion are carbon dioxide and water. During complete
combustion you'll burn cleanly with no Sooty residue
Covalent bond - ansA shared pair of electrons held between two non-metal Atoms
Decomposition reaction - ansA type of reaction that involves the splitting of a large molecule into smaller
molecules or elements.
Diatomic molecules - ansA molecule consisting of only two atoms of either the same or different elements.
Double displacement reaction - ansA type of reaction that involved to compound as reactants. It occurs when
the elements in the different compounds exchange places.
Electrolytes - ansSubstances that can dissolve in water to produce a solution that can conduct electricity
How to tell chemical change? - ansPrecipitate, change in color, gas formed, heat and light, and difficulty to
reverse change.
Incomplete combustion - ansWhen insufficient oxygen is available, sometimes incomplete combustion occurs.
The products would be carbon monoxide gas and carbon (soot) in addition to carbon dioxide and water.
Incomplete combustion can be indicated by a orange flickering flame.
