pH Scale
How is the pH scale measured?
From 0-14 using a logarithmic scale
Sulfur dioxide reacts with oxygen in the presence of a catalyst to produce sulfur trioxide in an industrial process known as the contact process, which is important for the production of sulfuric acid. The reaction involves the combination of sulfur dioxide and oxygen under controlled conditions.
Sulfur dioxide + Oxygen → Sulfur trioxide
What is the law of conservation of mass?
The law of conservation of mass states that mass cannot be created or destroyed in a chemical reaction; the total mass of the reactants equals the total mass of the products.
Where is the atomic number on your periodic table?
Above the chemical symbol.
How many stars are on the flag of New Zealand?
4
If a solution has a pH of 3, is it acidic or basic?
It is acidic.
Zinc reacts with copper sulfate in a single displacement reaction, where zinc displaces copper from its compound. This reaction is often used to demonstrate reactivity series, where a more reactive metal displaces a less reactive one from its salt solution. The products of this reaction are zinc sulfate and copper metal.
Zinc + Copper sulfate → Zinc sulfate + Copper
If 10 grams of reactants are used in a reaction, how many grams of products should be formed?
According to the law of conservation of mass, 10 grams of products should be formed, as mass is conserved.
Balance the following
Fe+O2→Fe2O3
4Fe+3O2→2Fe2O3
In Australia, which of these is NOT a colour of Smartie?
White
Why can small changes in pH have such a large effect on chemical reactions.
Small changes can have large impacts because the pH scale is a logarithmic scale - this means that each full number is a representation of 10 times more acidic or basic than the previous number.
Na3P + CaF2 --> NaF + Ca3P2
2 Na3P + 3 CaF2 --> 6 NaF + 1 Ca3P2
2H2+O2→2H2O, if 4 grams of hydrogen react with 32 grams of oxygen, what is the mass of water produced?
36g
C6H12O6+O2→CO2+H2O
C6H12O6+6O2→6CO2+6H2O
The sum of money paid to an insurer in return for coverage is referred to as your what?
The Premium
Explain how the pH of a solution is related to the concentration of hydrogen ions (H⁺) using the formula for pH.
As the more acidic a substance is the higher number of hydrogen ions it has.
Si(OH)4 + NaBr --> SiBr4 + NaOH
1 Si(OH)4 + 4 NaBr --> 1 SiBr4 + 4 NaOH
Why might it seem like mass is lost in a reaction if gas is produced?
It might seem like mass is lost when a gas is produced if the gas escapes into the air, but if the gas is collected and measured, the total mass would still be conserved.
Where is the mass number on your periodic table?
Trick question......
There is no mass number on your periodic table, only the atomic mass which is similar but still different from the mass number.
What year was the Premier League founded?
1992
If a solution has a pH of 8.5, and a small amount of a weak acid is added, why does the pH not change significantly?
because there is not enough of the acid to drastically effect the overall concentration of the hydroxide ions in the base solution.
in a small test tube, 10 drops of hydrochloric acid are added to 10 drops of sodium hydroxide - what is the result?
Sodium Chloride (aq) + Hydrochloric Acid (aq) --> Water (l) + Sodium Chloride (aq)
In the reaction C6H12O6+6O2→6CO2+6H2O 180 grams of glucose react with oxygen. After the reaction, 132 grams of carbon dioxide and 72 grams of water are collected. Was there any error in measurement, based on the Law of Conservation of Mass?
Since only 180 grams of glucose is given, the mass of oxygen must be 204−180=24 g
Define all three to get the points: Proton, Neutron, and Electron
Proton is the positively charged subatomic particle found within the nucleus.
Neutron is the subatomic particle with no charge that is found within the nucleus.
Electron is the negatively charged subatomic particle found outside the nucleus.
The word umpire originates from an Old French word meaning what?
Uneven