CAT 3: Research Investigation GROUP ACTIVITY ONE REPORT PER GROUP SODIUM BICARBONATE AND VINEGAR TEST Main Research Question: What type of vinegar is the most reactive with sodium bicarbonate? Other questions to research and comment on: What is the formula for each of the substances used in this experiment? What is the word and chemical equation for this experiment? List the uses of the different substances in this experiment. Write out what happens during this experiment to the different atoms. Why does vinegar and sodium bicarbonate react together. Aim: To determine…? To Determine ….. Watch You Tube clip: ‘Fair Test Investigation’ https://www.youtube.com/watch?v=OoGkCtrFYQY Hypothesis: Write this style of hypothesis: If ____________________________________________, then ________________________________________________. Variables: Independent: Type of vinegar Dependent: Height of bubbles/foam Controlled: - Amount of sodium bicarbonate Amount of vinegar Temperature of vinegar Materials: 3 x 100ml beaker white board marker spatula scale: electronic balance 3g sodium bicarbonate 25ml white vinegar 25ml malt vinegar 25ml apple cider vinegar Thermometer (optional) Method: 1. Mark each beaker with whiteboard marker labelled 2. 3. 4. 5. 6. white vinegar malt vinegar apple cider vinegar Measure 25ml of each vinegar in a measuring cylinder and pour into appropriate labelled beaker. Place 3g of sodium bicarbonate in a spatula (1 spatula full). Add the sodium bicarbonate to white vinegar. Observe the reaction and mark the level the reaction bubbles to. Repeat for malt wine and apple cider vinegar. Results: Table 1 – Height of bubbles / foam Type of Vinegar White Height of Bubbles (cm) Trial 2 Trial 3 Trial 1 Malt Apple cider Graph Results (bar graph) – include fully labelled axes, appropriate scale and title Discussion: Which vinegar reacted the most with the sodium bicarbonate? Which vinegar reacted the least with the sodium bicarbonate? Write the word equation for the reaction between white vinegar and sodium bicarbonate. What were some limitations of the experiment? How could these limitations be improved in the future? Conclusion: Re-state your hypothesis Accept or reject your hypothesis. Explain why you accepted or rejected your hypothesis. Use evidence from Table 1. Checklist for conclusion 1. 2. 3. 4. What was investigated ? What was discovered? Did the data support or disprove the hypothesis Evidence from the data collected ( DATA ) Average