methods.\n\n![Separation apparatus diagrams](https://assets.mathsgenie.co.uk/aqa-qb/d42a8849-13a1-4241-b80e-35454a76e766.png)\n\nIdentify which apparatus (**A**, **B**, **C**, or **D**) is used for each of the following **separation processes**:\n1. Chromatography\n2. Fractional distillation\n3. Separating immiscible liquids","markscheme":"- Chromatography is matched with **A** B1\n- Fractional distillation is matched with **B** B1\n- Separating immiscible liquids is matched with **C** C1","marks":3,"order":0,"markingRubric":null,"explanation":null,"options":[]},{"id":"d14e1167-456d-4c27-8cba-dd6a50fd92ce","label":"b","content":"A student is given a mixture of ethanol (boiling point $78^\\circ\\text{C}$) and water (boiling point $100^\\circ\\text{C}$).\nSuggest a physical method that they could use to separate the ethanol from the water.","markscheme":"- Fractional distillation B1","marks":1,"order":1,"markingRubric":null,"explanation":null,"options":[]},{"id":"6478e826-3ad7-4c8b-8282-b8e983b60cff","label":"c","content":"The student adds solid sodium carbonate powder to a beaker of dilute hydrochloric acid. This is an example of a **chemical change**.\nWrite down **two** observations the student can make to know a chemical reaction has taken place.","markscheme":"- Effervescence / bubbling / fizzing (due to gas release) B1\n- Solid sodium carbonate disappears / dissolves OR temperature of the mixture changes / beaker warms up B1","marks":2,"order":2,"markingRubric":null,"explanation":null,"options":[]},{"id":"361c43c9-dde8-43f4-b160-2c5bcc8db0b7","label":"d","content":"The particle model shows how particles are arranged and how they move in solids, liquids, and gases.\n(i) Describe how the particles are **arranged** in a liquid.\n(ii) Describe how the particles **move** in a liquid.","markscheme":"- (i) Particles are close together / touching but randomly arranged (no regular pattern) B1\n- (ii) Particles can move / slide past each other (randomly) B1","marks":2,"order":3,"markingRubric":null,"explanation":null,"options":[]}],"options":[],"explanation":null,"firstAttemptFullMarks":null}],"subjectCode":"gcse_chemistry__ocr","summaries":[{"id":"017ca31c-2f9e-42f0-bd19-c37c2a9d714a","difficultyBand":"medium","calculatorUse":null},{"id":"03bcbad9-aa62-409c-bace-e8a279b7b80f","difficultyBand":"easy","calculatorUse":null},{"id":"07699bc0-b666-4e76-9027-88335ce86cf2","difficultyBand":"medium","calculatorUse":null},{"id":"0f12f6d3-6af9-48db-9099-773d650c4f66","difficultyBand":"easy","calculatorUse":null},{"id":"0fb0397f-f9aa-46ac-91a5-1e7b8a4de8e5","difficultyBand":"easy","calculatorUse":null},{"id":"1741645d-fd5b-41cb-b73c-c9262db34553","difficultyBand":"medium","calculatorUse":null},{"id":"20a79399-2218-4cd8-aa5a-74548e0eef4a","difficultyBand":"medium","calculatorUse":null},{"id":"2199683d-9c35-46fb-af3f-c8232ae714e7","difficultyBand":"medium","calculatorUse":null},{"id":"21a05e23-77b3-429d-a7f2-3fde06c9ad66","difficultyBand":"medium","calculatorUse":null},{"id":"234baca0-ccfa-4b15-b4b8-307492c9b83b","difficultyBand":"easy","calculatorUse":null},{"id":"27eb3a99-525d-43f8-af02-03331a6b9a47","difficultyBand":"medium","calculatorUse":null},{"id":"289d2fc2-731e-46d5-aa4d-fed23eb1d154","difficultyBand":"medium","calculatorUse":null},{"id":"2b6ff83e-b3de-4b3d-89df-c74ab3bba1b1","difficultyBand":"easy","calculatorUse":null},{"id":"2cf405d7-cac4-49cc-a86f-ff6170a049fe","difficultyBand":"easy","calculatorUse":null},{"id":"2fc98bc1-e099-4683-82ef-50b8270b4c51","difficultyBand":"medium","calculatorUse":null},{"id":"311e514f-3e22-46c5-a2fd-e6f7fb390be3","difficultyBand":"medium","calculatorUse":null},{"id":"33a7e8b3-69a0-4b5f-847e-387812092025","difficultyBand":"easy","calculatorUse":null},{"id":"3450738d-ac33-48f7-9f24-639840a3da22","difficultyBand":"easy","calculatorUse":null},{"id":"35dd0f00-db0c-4789-bcd6-b9225bac6696","difficultyBand":"easy","calculatorUse":null},{"id":"371248bc-9017-4c52-87c8-c0ca96f623fa","diffic

Purity and separating mixtures

Question 17

Purity and separating mixtures Questions

Purity and separating mixtures

Question 17

Purity and separating mixtures Questions