A skeleton equation is an incomplete chemical equation.
100
Give an example of a symthesis reaction.
Like 2Mg + O2 → 2MgO etc. There are many examples.
100
Calculate the reaction rate 2g of Mg/40s
2g of Mg/40s= 0.05 g of Mg/s
100
Name the four factors that affect reaction rates.
Concentration of Reactants, Surface Area of Reactants, Temperature, Catalysts.
200
What is a chemical reaction?
A chemical reaction is simply processes that involve chemical change.
200
Balancethe equation. K + MgBr2 → KBr+Mg
2K + MgBr2 → 2KBr+Mg
200
Use ABCD to describe what happens in double replacement.
AB + CD → AD+CB
200
What is the reaction rate?
The reaction rate of a chemical reaction is the amount of a reactant consumed per unite time or the amount of a product formed per unit time.
200
Give an example of catalyst.
A fertilizer is an example of catalyst.
300
What is a chemical equation?
A chemical equation uses chemical formulas to describe the chemicals that (the reactants) and those that are produced (the products).
300
How many atoms are represented in this expression? H2SO4
There are 7 atoms are represented.
300
Predict the result of following skeleton equation, and balance it.
H2SO4+NaOH→
H2SO4+2NaOH→ Na2SO4+2H2O
300
What is kinetic molecular theory?
Matter is made up of tiny particles in constant, random motion.
300
Which of the following increases the rate of a reaction?
A increased temperature B larger number of reactants.
A
400
What is the Law of Conservation of Mass?
The Law of Conservation of Mass for a chemical reaction states that the total mass of the reactants is equal to the total mass of the products.
400
When balancing an equation, what cannot be changed, and what can be changed？
Onlycan change the coefficients and cannot change the subscript numbers.
400
Write the chemical formulas for the reactants and predict the most likely reaction type.
Hydrofluoric acid is reacted completely with strontium hydroxide.
2HCl+Sr(OH)2 → SrCl2 + 2H2O
400
If 30% of collisions are effect, how many collisions are effective of 200 total collisions?
200x30%=60 collisions
400
Which two ways does the temperaure of reactants increase?
1)increasing the frequency of all collisions.
2)increasing the energy of all collisions.
500
What particles are conserved in a chemical reaction?
A atoms
B molecules
C simple ions
D polyatomic ions
A, atoms.
500
Balance the equation. C8H18 + O2 → CO2 + H2O
2C8H18 +25O2 → 16CO2 +9 H2O
500
Predict the products of following equations.
A+B→
AB+XY→
H-Y+A-OH→
AB+X→
AB→
CxHy+O2→
A chemical reaction's rate is determine by the number of effective collision that occur in a given amount of time.(the frequency of effective collisions).
500
How does a catalyst increase reaction rate?
a catalyst increase reaction rate by increasing the percentage of effective collisions.