DP Chemistry (first assessment 2025)

Test builder »

Question 21M.2.SL.TZ2.d(i)

Select a Test
Date May 2021 Marks available [Maximum mark: 2] Reference code 21M.2.SL.TZ2.d(i)
Level SL Paper 2 Time zone TZ2
Command term Determine Question number d(i) Adapted from N/A
d(i).
[Maximum mark: 2]
21M.2.SL.TZ2.d(i)

Determine the mass, in g, of CaCO3 (s) produced by reacting 2.41 dm3 of 2.33 × 10−2 mol dm−3 of Ca(OH)2 (aq) with 0.750 dm3 of CO2 (g) at STP.

[2]

Markscheme

«nCa(OH)2 = 2.41 dm3 × 2.33 × 10−2 mol dm−3 =» 0.0562 «mol» AND

«nCO2 =0.750 dm322.7 mol dm-3=» 0.0330 «mol» ✓

«CO2 is the limiting reactant»

«mCaCO3 = 0.0330 mol × 100.09 g mol−1 =» 3.30 «g» ✓

 

Only award ECF for M2 if limiting reagent is used.

Accept answers in the range 3.30 - 3.35 «g».

Syllabus sections