Booklet 4 Flashcards
Name the following elements in order of reactivity from the experiments with acids: Al,Cu,Fe,Al,Zn,Mg
Magnesium,Aluminium (did not react),Zinc,Iron,Copper
What evidence is there that the reaction of metal and a acid has occurred?
There will be a squeaky pop when a lit splint was put over the test tube
What is the charge on Hydrogen?
H+
In the experiment of sodium hydroxide with hydrochloric acid, why does the Sulphuric acid take half the amount acid?
As the sulphuric acid has 2x the amount of hydrogen so it can donate 2xH+ per molecule, rather than the other acid which only has one H
Is an oxide an alkali or acid?
Alkali
How do you calculate the effectiveness of an indigestion tablet?
Divide the volume of acid by the cost per tablet
How do you work out the cost per tablet?
Cost of packet divided by the number of tablets
How do you calculate the percentage of mass in an compound?
Using atomic masses calculate the amount of the element in the compound. Then divide that number but the total amount for all the atomic masses in the compound
What do acids contain and what do they require to form salts?
They contain hydrogen and require a metal to get a salt
Was the experiment about acids and metals a fair experiment?
No as some metals did not react
What is titration?
Titration is the slow addition of one solution of a known concentration (called a titrant) to a known volume of another solution of unknown concentration until the reaction reaches neutralization, which is often indicated by a color change.
Name a metal which will not react with an acid to produce hydrogen
Gold
Are metal oxides and hydroxides soluble in water?
Most are not soluble in water
What are metal oxides and hydroxides which are soluble in water called?
Alkali
What happens when an alkali dissolves?
It produces an alkali solution
