Topic 1 - Key Concepts in Chemistry Flashcards Preview

GCSE Chemistry Edexcel Grade 9-1 course > Topic 1 - Key Concepts in Chemistry > Flashcards

Flashcards in Topic 1 - Key Concepts in Chemistry Deck (15)
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1
Q

What are the molecules on the right-hand side of a word equation called?

A

The products

2
Q

What are the molecules on the left-hand side of a word equation called?

A

The reactants

3
Q

What does (s) mean?

A

Solid

4
Q

What does (l) mean?

A

Liquid

5
Q

What does (g) mean?

A

Gas

6
Q

What does (aq) mean?

A

Aqueous (dissolved in water)

7
Q

What is the chemical formula of chlorine?

A

Cl₂

8
Q

What is the chemical formula of ammonia?

A

NH₃

9
Q

What is the ammonium ion’s formula?

A

NH₄+

10
Q

What is the nitrate ion’s formula?

A

NO₃ -

11
Q

What is the sulfate ion’s formula?

A

SO₄² -

The ion charge is 2-

12
Q

What is the hydroxide ion’s formula?

A

OH-

13
Q

What is the carbonate ion’s formula?

A

CO₃²-

The ion charge is 2-

14
Q

what is an ionic equation?

A

an equation when only the reacting particles (and the products they form are included). You can write an ionic equation for any reaction involving ions in solution.

15
Q

how do you write an ionic equation?

A

you write a balanced symbol equation and take out any aqueous ions which are present on both sides of the equation (they haven’t reacted or been changed.)

step 1: write the full balanced symbol equation

step 2: anything that’s ionic and aqueous will break up into its ions in solution so write the equation showing all the aqueous ions separately.

step 3: to get the ionic equation cross out anything which is the same on both sides of the equation (is the same and hasn’t reacted/been changed.)

step 4: write out the ionic equation without the ions you crossed out, the overall charge should be the same on both sides.