6 Samples 10–18 were prepared in our laboratory using a revised version of the precipitation method established by the ISF Institute in Germany.6 7 Th is method obtains a precipitate through the addition of BaCl2.2H2O; the resulting precipitate can be washed and stored easily. In this sentence, the writer: 1___________________ 2___________________ 3___________________ 4___________________ 5___________________ 6___________________ 7___________________
Methodology — Writing Task 59 2.3.2 Key