paper 1b – Vertex

M25-CHEM-HL-TZ1-P1B-Q1

A student investigated the effect of concentration on the rate of reaction between sodium thiosulfate, \( Na_2S_2O_3 \), and hydrochloric

A student was given a mixture to separate and collect the individual components. The mixture contained sand, \( SiO_2(s) \),

A colorimetry experiment was conducted on a series of solutions of copper(II) sulfate, \( CuSO_4 \). The absorbance versus concentration

Recrystallization is a technique frequently used to purify solids.

Half-cells such as \( Fe^{3+}(aq)+e^{-}\rightleftharpoons Fe^{2+}(aq) \) can be connected to other half-cells to form a voltaic cell.

A teacher gave the class an experimental assignment to determine the concentration of aqueous sodium hydroxide, NaOH, using \( 2.00~mol~dm^{-3}

The graph shows the variation of the first ionization energy with atomic radius for periods 2, 3 and 4 of

A student wanted to determine what colour inks were mixed to produce black ink and their relative polarities using paper

A student was asked to identify an unknown metal with a mass of 1.28 g using calorimetry. The metal was

A student needed to make \( 500.0~cm^{3} \) of a \( 0.2500~mol~dm^{-3} \) solution of sodium hydroxide, NaOH, from the