Pearson Edexcel International GCSE (9–1) · CHEMISTRY · Section
Calcium chloride
19 practice questions
Practice questions
11–19 of 19
Question 11
2 marks · Normal
Answer and see the solution →Lithium fluoride forms when lithium reacts with fluorine. Draw a dot-and-cross diagram to show the ions present in lithium fluoride after the ionic bond has formed.
Question 12
3 marks · Normal
Answer and see the solution →(a) Lithium fluoride is formed when a lithium atom reacts with a fluorine atom. Each atom transfers electrons to form ions.
Draw a dot-and-cross diagram to show the ionic bonding in lithium fluoride. Label each ion clearly and show the charges.
Question 13
3 marks · Normal
Answer and see the solution →(a) Calcium chloride is formed when one calcium atom reacts with two chlorine atoms. Calcium transfers electrons to each chlorine atom.
Draw a dot-and-cross diagram to show the formation of calcium chloride. Label each ion and show their charges.
Question 14
4 marks · Normal
Answer and see the solution →A student attempts to draw the dot-and-cross diagram for lithium fluoride (LiF) but makes some mistakes. Examine the student’s diagram and answer the following questions.
(a)[2 marks]Student's dot-and-cross diagram for LiF Identify two mistakes in the student's dot-and-cross diagram for lithium fluoride.
(b)[2 marks]Draw a correct dot-and-cross diagram for lithium fluoride (LiF). Use dots (•) for lithium electrons and crosses (×) for fluorine electrons, or vice versa. Show only the outer shell electrons.
Question 15
1 mark · Normal
Answer and check →Which statement best describes the dot-and-cross diagram for calcium chloride (CaCl)?
- A.The calcium atom shares electrons equally with two chlorine atoms.
- B.The calcium atom transfers two electrons, one to each chlorine atom.
- C.Each chlorine atom gives an electron to the calcium atom.
- D.The calcium and chlorine atoms both lose all their outer shell electrons.
Question 16
4 marks · Normal
Answer and see the solution →Calcium chloride is an ionic compound formed from calcium and chlorine atoms.
(a)[1 mark]State the electronic configuration of a calcium atom and a chlorine atom.
(b)[1 mark]Describe, in terms of electron transfer, how calcium and chlorine form ions in calcium chloride.
(c)[2 marks]Draw a dot-and-cross diagram to show the ions present in calcium chloride (CaCl₂). Use dots (•) for calcium’s electrons and crosses (×) for chlorine’s electrons.
Question 17
2 marks · Hard
Answer and see the solution →Describe how electrons are transferred when a lithium atom and a fluorine atom react to form lithium fluoride. Your answer should explain how this transfer leads to the formation of ions.
Question 18
5 marks · Hard
Answer and see the solution →Calcium chloride is formed when calcium reacts with chlorine.
(a)[1 mark]State the electronic configuration of a calcium atom and a chlorine atom.
(b)[2 marks]Explain how calcium and chlorine atoms achieve full outer shells when forming calcium chloride.
(c)[2 marks]Draw a dot-and-cross diagram to show the ions formed in calcium chloride. Show only the outer shells.
Question 19
2 marks · Hard
Answer and see the solution →State the charge on each ion and the number of electrons in the outer shell of each ion in lithium fluoride.