6 marksFoundation and Higher
A student investigates how the concentration of hydrochloric acid affects the rate of its reaction with magnesium ribbon. Hydrogen gas is produced.
Plan an investigation using a gas collection method.
Include the variables the student should control.
[6 marks]6 marksFoundation and Higher
Crude oil is separated into fractions in a fractionating column.
Explain how fractional distillation separates crude oil into fractions.
[6 marks]6 marksFoundation and Higher
Group 1 and group 7 elements both show trends in reactivity.
Reactivity increases down group 1 but decreases down group 7.
Explain these two trends in terms of electrons.
[6 marks]4 marksFoundation and Higher
Some metals are added to solutions of metal sulfates.
.1Which two mixtures react? Tick two boxes.
[2 marks] .2Explain, in terms of ions, why magnesium is more reactive than zinc.
[2 marks] 6 marksFoundation and Higher
Silicon dioxide (silica) melts at 1710 °C. Poly(ethene) softens at about 120 °C. Methane boils at −162 °C.
Explain the differences in these temperatures.
Refer to the structure and bonding of each substance.
[6 marks]