Werkblad Scheikunde voor toelatingsexamens verpleegkunde met antwoorden

What is an acid–base indicator?

1. AA device that measures temperature
2. BA substance that changes colour depending on pH
3. CA gas given off by acids
4. DA substance that neutralises every acid

Elements in the same period of the periodic table have the same number of what?

1. AProtons
2. BOccupied electron shells
3. CValence electrons
4. DNeutrons

In a chemical reaction, what is the limiting reactant?

1. AThe reactant that runs out first and stops the reaction
2. BThe reactant with the largest mass
3. CThe catalyst that controls the speed
4. DThe reactant that is left over at the end

Why does keeping food in a refrigerator slow down spoilage?

1. ALower temperatures raise the activation energy of every reaction
2. BLower temperatures slow down chemical and microbial reactions
3. CCold air contains no oxygen
4. DCold temperatures add preservatives to the food

Hoeveel mol is 88 g koolstofdioxide (molaire massa 44 g/mol)?

1. A2 mol
2. B0,5 mol
3. C3872 mol
4. D44 mol

What is the oxidation number of an element in its uncombined (elemental) form, such as Fe or O₂?

1. A+1
2. B0
3. CIt equals the group number
4. D−1

In the reaction NaCl(aq) + AgNO₃(aq) → AgCl(s) + NaNO₃(aq), which ions are spectator ions?

1. ANa⁺ and NO₃⁻
2. BNa⁺ and Cl⁻
3. CAg⁺ and NO₃⁻
4. DAg⁺ and Cl⁻

Using PV = nRT with R = 0,082 L·atm/(mol·K), how many moles of gas are in 24,6 L at 1 atm and 300 K?

1. A2 mol
2. B300 mol
3. C1 mol
4. D0,5 mol