Periodic Table
Which element has the symbol of P ?
Phosphorous
Give an example of a solvent.
Water , ethanol , ether
Soft drinks are basic solutions , T OR F
F
A theory that explains the reaction process related to reaction kinetics.
collision theory
Which unit is used to measure the temperature?
C
K
F
What name is given to the second group of elements in the periodic table?
alkali earth metals
Another name for a homogenous mixture
Solution
The pH value of a apple juice is > 7.
T OR F
F
Two essential conditions required for a successful collision
proper orientation
enough energy
Which device is used to measure the heat of a chemical reaction
Calorimeter
which group number contains noble gases?
group 18
A solution that poorly conducts electrical current.
Weak electrolyte.
What is the formula that relates the pH to the hydronium ion concentration?
pH = - log [H3O+ ]
Which species has the greatest energy value in the energy diagram
activated complex
When the change in the heat of a reaction is (-), determine the type of the chemical reaction
exothermic reaction
An element has the following electron configuration
1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d1 , to which block does the element belong ?
d- block
Give the formula used to calculate the molarity.
molarity = Mass/ molar mass
Define Lewis base.
a compound or ionic species which can donate an electron pair to another compound.
Mention 4 factors that affect the reaction rate.
Concentration of reactants
temperature
pressure
nature of chemicals
using a catalyst.
Give one example of endothermic change.
Melting of ice.
respiration
Which element that has two valence electrons but does not appear in the second group in the periodic table?
Helium
how many liters are 30ml ?
30 ml = 0.03 L
Which acid is used in the activation of oil wells?
Hydrochloric acid.
How to determine the reaction order for a single- step chemical reaction?
the reaction order is determined using the coefficient in the balanced chemical equation
If the heat of the reactants in a certain reaction = 60KJ , the heat of products is = 35 KJ, calculate the heat of the reaction.
- 25 KJ