Christmas 2024 Chemis Tree Challenge

• Chemistry
• Middelbare school
• havo
• Leerjaar 3

Christmas 2024 Chemis-tree Challenge

What is the name of this ion? CO₃^2-

Give the type of reaction

2Li(s) + CuSO₄(aq) → Li₂ SO₄(aq) + Cu(s)

1. combustion
2. ionic
3. synthesis
4. displacement

What is the name of this ion? SO₄^2-

Fill in the blancs: 

hydrochloric acid + sodium hydroxide → sodium chloride + water

                                            ______ + NaOH → _____ + H₂O 

1. HCl, SoCl
2. HCl, NaCl
3. HCl acid, NaCl
4. HClO, NaCl

Give the type of reaction

2Li(s) + Cu²⁺(aq) → 2Li⁺(aq) + Cu(s)

1. combustion
2. ionic
3. synthesis
4. displacement

What is the name of this ion? NH₄⁺

Give the state symbols

2Li(...) + Cu²⁺(...) → 2Li⁺(...) + Cu(...)

1. s, s, aq, aq
2. s, aq, s, aq
3. aq, s, s, aq
4. s, aq, aq, s

What is the name of this ion? OH^-

Balance the combustion of methane:

                        __CH₄ + __O₂ -->__ CO₂ + ___H₂O

1. 1, 2, 1, 2
2. 1, 1, 2, 2
3. 2, 3, 2, 2
4. 2, 2, 3, 2

What is the correct formula for
carbon tetrafuoride?

1. C​4​​F
2. CF
3. CF​3​​
4. CF​4​​

nitric acid + zinc → ____ nitrate + hydrogen

What is the name of Al(OH)₃

1. allithium hydroxide
2. aluminium triohydroxide
3. aluminium hydroxide
4. aluminium hydrogen oxide

What is the name of this ion? NO₃^-

which equation is correct?
(assume the index numbers are subscripts)

1. Mg + O → MgO
2. Mg + O2 → MgO2
3. 2Mg + O2 → MgO
4. 2Mg + O2 → 2MgO

What is the name of this compound? 

LiNO₃

copper sulfate + magnesium form...

1. magnesium sulfate
2. copper and magnesium ions
3. copper
4. magnesium sulfate + copper

What is the name of this compound? CaO

What is the correct formula for
sulfur hexafluoride?

1. SF​6​​
2. S​6​​F
3. SF​7​​
4. (SF​3​​)​2​​

What is the name of this compound? 

N₂O

What is the correct formula for
magnesium chloride

1. MgCl​3​​
2. MgCl​2​​
3. MgCl
4. Mg​2​​​​​Cl

What is the name of this compound? 

CoCl₂

Balance the equation. What is the sum of the coefficients

__Al + __O₂ --> __Al₂O₃

1. 8
2. 9
3. 10
4. 11

What is the correct formula for
zinc(II) nitride

1. ZnN
2. ZnN​2​​
3. Zn​2​​N​3​​
4. Zn​3​​N​2​​

___Al₂O₃ + ___NaOH → ___2NaAlO₂ + ___H₂O

what is the coefficient for NaOH?

Give a number

What is the correct formula for
ammonia?

1. NH​4​​
2. NH​2​​
3. NH​3​​
4. N​2​​

What is the correct formula for
barium carbonate?

1. BaCO​3​​
2. BaCO​2​​
3. BaOC​3​​
4. BCO​3​​

What is the name of this compound? 

CCl₄

What is the correct formula for
ammonium chloride?

1. NH​3​​Cl
2. NH​4​​Cl
3. NH​4​​Cl​2​​
4. NHCl​3​​

What is the correct formula for
potassium bromide?

1. KaBr
2. PB
3. PBr
4. KBr