Balancing Equations Flashcards
What is the chemical and word formula of aerobic respiration?
C6H12O6 + 6O2 —> 6H2O + 6CO2
glucose + oxygen —> water + carbon dioxide
Are respiration or photosynthesis a form of combustion?
No
What is the combustion word equation?
hydrocarbon + oxygen —> water + carbon dioxide
What is the bonding between a non-metal and metal word equation?
metal + non-metal —> metal non-metal (-ide)
What is the Group 1 reaction with water word equation?
group 1 metal + water —> group 1 metal hydroxide + hydrogen
What is the photosynthesis word and chemical equation?
6H2O + 6CO2 —> C6H12O6 + 6O2
carbon dioxide + water —sunlight and chlorophyll—> oxygen + glucose
What is the word equation for interaction with hydrochloric acid?
hydrochloric acid + metal oxide —> metal chloride + water
What is the reaction between a metal and acid?
Metal + acid → salt + hydrogen
What is the reaction of acids and alkalis?
acid + alkali —> salt + water
What state of matter are acids?
Acids are all aqueous
Solid state symbol
(s)
Liquid state symbol
(l)
Gases state symbol
(g)
Aqueous state symbol
(aq)
What state of matter are metals?
Metals are always solid at room temperature except for mercury.
What state of matter are ionic compounds?
Ionic compounds can be solid or aqueous - it depends on their shape.
If water is present and the ionic compound is soluble it will dissolve and therefore has the state symbol (aq).
If the ionic compound is insoluble it will not dissolve and therefore have the state symbol (s).
Water always has the state symbol (l).
Does the mass appear to change when magnesium burns in oxygen?
The mass would appear to increase as, before the reaction, the oxygen is not bonded with the magnesium, hence not weighed in the air, and, once bonded, appears to increase in mass.
What is the word equation and chemical equation between calcium carbonate and hydrochloric acid?
calcium carbonate + hydrochloric acid —> calcium chloride + water + carbon dioxide
CaCO3 (s) + 2HCl (aq) —> CaCl2 (aq) + H2O (l) + CO2 (g)
What is the reaction between metal carbonate and an acid word equation?
metal carbonate + acid —> salt + water + carbon dioxide
Do gases have mass?
YES
In the reaction between calcium carbonate and hydrochloric acid, what happens to the mass?
The mass appears to decrease as the carbon dioxide has escaped into the atmosphere.
What is the word equation of a precipitation reaction?
metal 1 non-metal 1 + metal 2 non-metal 2 —> metal 1 non-metal 2 + metal 2 non-metal 1
What is ammonia?
Ammonia is a compound NH3, on its own
What is ammonium?
Ammonium is part of compounds, covalently bonded, as NH4
What is the precipitation reaction between lead nitrate and potassium iodide word and chemical equation?
lead nitrate + potassium iodide —> potassium nitrate + lead iodide
Pb(NO3)2 (aq) + 2KI (aq) —> 2KNO3 (aq) + PbI2 (s)
What happens to the mass in the precipitation reaction between lead nitrate and potassium iodide?
There is no change in mass (nothing added to the environment or lost into the atmosphere).
What is the conservation of mass?
The Law of Conservation of Mass states that no matter is lost or gained during a chemical reaction. Mass is always conserved, therefore the total mass of the reactants is equal to the total mass of the products, which is why all chemical equations must be balanced.
Balance:
aluminium oxide + sulphuric acid (H2SO4) —> aluminium sulphate + water
Al2O3 (s) + 3H2SO4 (aq) —> Al2(SO4)3 (s) + 3H2O (l)
Balance:
sodium carbonate + nitric acid (HNO3) —> carbon dioxide + water + sodium nitrate
Na2CO3 + 2HNO3 —> CO2 + H2O + 2NaNO3
Balance:
nitrogen + hydrogen —> ammonia
N2 + 3H2 —> 2NH3
Spot the mistake in:
K + H2O —> KOH + H
2K + 2H2O —> 2KOH + H2
