k Flashcards
ions
an atom or group of atoms that have a positive or negative charge which are formed by the loss or gain of an atom.
Acid and metal reactions produce
Hydrogen gas and a salt
4 types of chemical reactions that can take place
1) Acid + Metal > Hydrogen gas + Salt
2) Acid + hydroxide base>Water + Salt
3) Acid + carbonate base > Water + Salt + Carbon Dioxide
4) Acid + hydrogen carbonate > Water + Salt + Carbon Dioxide
acid + metal carbonate reaction equation
Acid + Metal Carbonate >Salt + Carbon Dioxide + Hydrogen
Combustion reaction chemical equation
Fuel+Oxygen>carbon dioxide+water
Combustion
a reaction in which a substance reacts with oxygen gas, releasing energy in the form of light and heat
Complete combustion
when all the oxygen in reactions are used up
Why are fuels combustion reactions
they have enough oxygen to make carbon dioxide.
combustion reaction equation
fuel + oxygen 🡪 carbon dioxide + water
Incomplete combustion
When the air supply is limited, carbon monoxide can be produced instead of
carbon dioxide.
Incomplete combustion equation
Fuel + limited oxygen 🡪 carbon monoxide+carbon+water
How is carbon released in an incomplete combustion reaction
as a soot(black powder)
hydrocarbon
type of compound that combust extremely well.
hydrocarbon examples
Coal, petrol, natural gas
how are exothermic reactions related to combustion reactions
both reactions release heat
why do some fires produce smoke
when there is an incomplete combustion(not enough oxygen to burn the fuel completely)
example of complete combustion
Burning candle wax
example of an incomplete combustion
burning paper
corrosive
ability for a substance to destroy materials every material it comes in contact with,
concentration
measure of the amount pf hydrogen ions in an acid or hydroxide ions in a base
why is respiration an exothermic reaction
the process of glucose being broken down results in a release of energy.
how to be certain 100% that a chemical reaction has taken place
a new substance has appeared
when does a chemcialr eaction take place
when the bonds between atoms are broken and new bonds are formed.
Some chemical reactions require the supply of energy to get them started. Identify two forms of energy that can be the sources of this energy.
heat or light
NaCl
sodim chloride
KF
potassium flurorine
BeO
Beryllium oxide
Q4. Is respiration an endothermic or exothermic reaction, why?
the process of glucose being broken down results in a release of energy.
Q4. Is respiration an endothermic or exothermic reaction, why?
the process of glucose being broken down results in a release of energy.
MgI 2
Magnesium Iodide
FeN
Iron Nitride
FeN
Iron Nitride
AlP
Aluminium Phosphide
Explain what colour red litmus paper changes in the presence of acids, bases and neutral substances.
red litmus paper turns blue in the presence of a base, red in acids and red in neutral substances
Give three everyday examples of neutralisation reactions.
indigestion, soil treatment and treatment of ant and bee bites
chemical formula for Lithium floride
LiF
chemical formula formagnieusm chlride
MgCl
respiration equation
oxygen+glucos>carbon dioxide + water
respiration equation
oxygen+glucos>carbon dioxide + water
what colourdoes red litmus paper turn in the presence of acids, base and neutral substacnes
turns blue in the presence of a base, red in acids and red n neutral substances
what colourdoes blue litmus paper turn in the presence of acids, base and neutral substacnes
turns red in the presence of a base, blue n acids and blue in neutral substances
what elemtn has electorn configration of 2, 8,1
sodium
what has the electron configration of 2,1
lithium
what has the elctron configuration of 2,8,8,2
calcium
how does antigen and antibody compelx work
molecule that is formed by the bonding of multiple antigens to antibodies
where are B and T cells produced
bone marrow and in the thymus
what number and charge is sodium,lithium and calcium likely to form
sodium-1 positive cation
lithium-1 positive cation
calcium- 2 positive cations
when is a cation formed and an anion
cation formed when an atom loses an electron
anion formed when an electron is added toatom
state whether the reaction between sodium hydrogen carbonate and ethanoic is an exo or endothermic reaction and why.
endothermicreaction because there is a temperature decrease. In thischemical change, heat was absorbed which meant the surrounding cooler.
