4.7.3 Movement & Interaction- Acids &Alkalis Flashcards
A solution has a pH of 11. The concentration of H+ ions increases by a factor of 10. What is the new pH?
10
How can the solid salt be collected from a soluble solution?
Heat it
In a reaction profile for an exothermic reaction where will the energy level for reactants be compared to the level for products?
Higher
In which type of reaction does a temperature increase occur?
Exothermic
What is an alkali?
A soluble base
What is the charge of a chlorine ion?
-2
What is the charge on a hydrogen ion?
+1
What salt will be produced when hydrochloric acid reacts with magnesium carbonate?
magnesium chloride
What type of current is used in mains electricity?
a/c
What type of ions do acids produce in aqueous solutions?
H+
What type of ions do metals form?
Positive
What will the products of this reaction be lithium + magnesium oxide –>
magnesium + lithium oxide
Which gas is tested for using a lit splint?
Hydrogen
Which is the correct order of reactivity?
Lithium, sodium, magnesium, copper
Which of the following is not an example of a strong acid?
Ethanoic
Which of the following is not an example of a weak acid?
Nitric
What type of ion do all metals produce?
Positive ions
What are the products of a reaction between an acid and a metal?
A salt and Hydrogen
Describe the test for hydrogen.
A burning spill is held in the gas and makes a squeaky pop sound.
What are the products of a reaction between an acid and a metal carbonate?
A salt, water and carbon dioxide
Describe the test for carbon dioxide.
Bubbling carbon dioxide through limewater turns it from clear to cloudy
How is the name of a salt determined?
The name of the metal and the name of the acid used.
What type of salt will be produced by hydrochloric acid?
Chloride
What type of acid is used to produced a nitrate salt?
Nitric acid
What energy change occurs when bonds in reactants are broken?
Increase as energy is absorbed
What energy change occurs when bonds in products are made?
Decrease as energy is given out
What is an exothermic reaction?
A reaction where more energy is given out than taken in
Give an example of an exothermic reaction.
Combustion
respiration
neutralisation
What happens to temperature during an exothermic reaction?
Temperature increases
What is an endothermic reaction?
A reaction that takes in more energy than it gives out
Give an example of an endothermic reaction.
Photosynthesis
thermal decomposition
What happens to temperature during an endothermic reaction?
Temperature decreases
What ion do acids produce when dissolved in water?
H+
Why is nitric acid described as a strong acid?
It fully ionises in water
Give an example of a weak acid.
Citric
ethanoic
carbonic
What does a concentration of 3M mean?
3 moles of acid is dissolved in one litre of water
A solution has a concentration of 2.5M. Is this concentrated or dilute?
Dilute
Explain your answer to Q5.
Concentrated solutions are above 5M
Describe the properties of a 10M solution of ethanoic acid.
Weak & Concentrated
Describe the properties of a 4M solution of sulphuric acid.
Strong, dilute acid
