Rates of Reaction
What is a catalyst?
A substance that is used to speed up a chemical reaction, but remains chemically unchanged at the end of the reaction
Why is an atom overall neutral?
It has the same number of positive protons as negative electrons which balance each other out
A covalent bond forms between what types of elements?
non-metal elements
What is the name of a compound which contain calcium and chlorine?
Calcium Chloride
H+ ions are in higher concentration in which type of solution?
Acidic
What effect does increasing the particle size have on the rate of reaction?
It decreases the rate of a chemical reaction
What is the charge on a group 1 ion?
+1
Complete the sentence:
An ionic bond forms due to the
electrostatic attraction between a positive metal ion and negative non-metal ion
What is the name of a compound which contains copper, nitrogen and oxygen?
Copper nitrate
Describe what happens to the pH of an alkaline solution when it is diluted.
pH decreases
A student measures the volume of gas produced in a chemical reaction and measures the volume every 20 seconds. What would the units be for the reaction?
cm3s-1
What does the atomic number tell you?
The number of protons in a nucleus
State the term used to describe the structure of solid strontium chloride
Ionic Lattice
Calculate the formula mass of CaCO3
100g
Name the salt produced if lithium carbonate and sulfuric acid react together
lithium sulfate
The mass and volume of reactants used
125
State why ionic compounds, like strontium chloride, conduct electricity when molten.
Ions are free to move
What is the name of the compound with the formula Ag2O?
Silver (I) oxide
Name the base used if the products of a reaction are zinc chloride, water and carbon dioxide
zinc carbonate
Volume and Mass can be used to follow the rate of a chemical reaction. Name the other 2 measurements that can be taken to follow the rate of a reaction
pH and concentration
10
Tungsten(VI) fluoride is a toxic, colourless gas at room temperature. State the type of bonding and structure present in the compound
Covalent molecular
Balance the following equation:
C6H12 + O2 -> CO2 + H2O
C6H12 + 9O2 -> 6CO2 + 6H2O
Sulfur was burned in air. The product was added to water, producing what type of solution?
Acidic