18.1 Activity sheet Core Below is a summary of the steps used to make the salt, zinc sulfate. Step 1 Add excess zinc to the acid in a beaker. Wait until bubbling stops. Step 2 Filter the mixture and retain the filtrate. Step 3 Heat the filtrate until the volume is reduced, then leave to cool. 1 a Write down the materials used for this preparation of zinc sulfate. …………………………………………………………………………………………………………………………….. …………………………………………………………………………………………………………………………….. b What extra information is needed to fully specify the materials? …………………………………………………………………………………………………………………………….. …………………………………………………………………………………………………………………………….. 2 a Write down the names of all pieces of apparatus shown in the diagrams. ………………………………………………….. ………………………………………………….. ………………………………………………….. ………………………………………………….. b Write a list of any other apparatus needed. ………………………………………………….. ………………………………………………….. ………………………………………………….. ………………………………………………….. ………………………………………………….. ………………………………………………….. ………………………………………………….. ………………………………………………….. ………………………………………………….. ………………………………………………….. © Oxford University Press 2021; This resource sheet may have been changed from the original. 3 a Describe the purpose of each step. Step 1 …………………………………………………………………………………………………………………. …………………………………………………………………………………………………………………………….. …………………………………………………………………………………………………………………………….. …………………………………………………………………………………………………………………………….. Step 2 …………………………………………………………………………………………………………………. …………………………………………………………………………………………………………………………….. …………………………………………………………………………………………………………………………….. …………………………………………………………………………………………………………………………….. Step 3 …………………………………………………………………………………………………………………. …………………………………………………………………………………………………………………………….. …………………………………………………………………………………………………………………………….. …………………………………………………………………………………………………………………………….. b In step 1, why is it important to wait until bubbling stops? …………………………………………………………………………………………………………………………….. c In step 2, what is the residue? …………………………………………………………………………………………………………………………….. d What piece of apparatus could you use to collect the gas given off in step 1? …………………………………………………………………………………………………………………………….. 4 Magnesium sulfate can be prepared in a similar way. Write detailed instructions for the preparation of magnesium sulfate – remember ‘MAM’ (materials, apparatus, method). If you include diagrams to illustrate the method, remember to label each piece of apparatus and the materials. © Oxford University Press 2021; This resource sheet may have been changed from the original.
