Acid and reactions
Name the type of reaction for the following:
HCl + NaOH -> NaCl + H2O
Acid-base, neutralisation, acid-metal hydroxide
What are the five factors that can influence rates of reactions?
Temperature, concentration, surface area, agitation, catalysts
What type of ion would an oxygen atom become?
Anion
Which variable is changed?
Independent variable
What is the name of the following compound:
H2SO4
Sulfuric acid
What are the products of an acid-carbonate reaction?
Salt + water / H2O + carbon dioxide / CO2
Draw a diagram explaining how increasing temperature increases rates of reaction.
(Teacher's discretion)
What types of atoms form a covalent bond?
Non-metal + non-metal
"If, then" statement, linking the independent and dependent variable
What should a conclusion include? Make reference to keywords.
Summary of results, hypothesis supported/rejected, supported with evidence (data)
What is the chemical formula for phosphoric acid?
H3PO4
Catalysts can increase rates of reaction by lowering the activation energy; define activation energy.
Energy required for a reaction to occur
Sodium (Na) has the atomic number 11. When ionised, what is sodium's charge?
+1
What type of graph should you use for discrete data?
Bar graph
What is dihydrogen monoxide more commonly known as?
Find the products of the following reaction: HNO3 + KOH
KNO3 + H2O
Explain how concentration effects rates of reaction with reference to collision theory.
Increasing concentration increases the amount of available particles and therefore the likelihood of successful collisions, increasing the rate of reaction.
Describe the behaviour of electrons when oxygen forms a bond with nitrogen.
Share electrons
What error type is the following: provided lab reagents were inconsistently prepared for use.
Systematic error
Ammonium
Find the missing numbers to balance the equation: [_]H₂SO₄ + [_]AlCl₃ -> [_]HCl + [_]Al₂(SO₄)₃
3, 2, 6, 1
Does food last forever in the freezer? Explain your answer.
No - not absolute zero; the rate of spoiling is decreased but not completely stopped.
Explain why atoms ionise. Make reference to reactivity.
Ionising will stabilise the atom, reducing its reactivity.
Suggest one way to improve validity.
(Teacher's discretion)
For methane (CH4), one carbon atom is directly bonded to four hydrogen atoms. Explain why ethanoic acid is expressed as CH3COOH.