Sliding mark: either so (Al layers) can slide or so layers cannot slide 1 [8] (a) the ions can move / travel / flow /are free M5. accept particles / they for ions allow delocalised ions or ignore delocalised / free electrons ignore references to collisions accept converse with reference to solid the ions carry the charge / current ignore ions electricity 1 (b) any one from: because they are negative / anion • allow Cl– ignore chlorine opposite charges / attract • 1 (c) 13 1 (d) (i) reasonable attempt at straight line which misses the anomalous point must touch all five crosses do not allow multiple lines 1
Sliding mark: either so (Al layers) can slide or so layers cannot slide 1 [8] M5. (a) the ions can move / travel / flow /are free accept particles / they for ions allow delocalised ions or ignore delocalised / free electrons ignore references to collisions accept converse with reference to solid the ions carry the charge / current ignore ions electricity 1 (b) any one from: • because they are negative / anion allow Cl– ignore chlorine • opposite charges / attract 1 (c) 13 1 (d) (i) reasonable attempt at straight line which misses the anomalous point must touch all five crosses do not allow multiple lines 1
c6_electrolysis_mark_scheme.docx