what happens after rinsing any drops of vinegar adhering to the side of the flask, another 20 ml of deionized water was added to the vinegar in the flask
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what happens after rinsing any drops of vinegar adhering to the side of the flask, another 20 ml of deionized water was added to the vinegar in the flask
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- If you have an empty burette in a burette clamp, in what order do you do these steps to fill the burette with liquid (either water for washing, or the titrant)? Drag the steps below into the correct order. Step 1: Close the tap. Step 2: Step 3: Step 4: Step 5: Step 6: Step 7: Return burette to burette clamp. Remove burette from clamp. Hold burette with top below eye level. Put plastic funnel into top of burette. Fill burette with liquid. Remove plastic funnel.1. What made an ashless filter paper ashless? 2.What type of precipitate is BaSO4?Materials Needed solid I2 solid CUSO4-5H20 food dye solid (NH4)2SO4 heavy metals waste container halogenated waste container non-halogenated waste container semi-micro test tubes and rack regular test tubes and rack squash pipettes acetone cyclohexane propan-2-ol Method Part A: Solubility of ionic and molecular solids 1. Place a small amount (about the size of 1 grain of rice, see picture) of copper sulfate into each of three DRY semi-micro test tubes. Add 20 drops of water to the first test tube and gently flick the test tube with your finger to ensure mixing. 2. Repeat step 1 using acetone in place of water as the solvent in the second test tube. 3. Repeat step 2 replacing acetone with cyclohexane in the third test tube. Hold the test tubes against a white background to compare the solubility of copper sulfate in the three solvents and record your results. Discard these mixtures into the heavy metals waste container in the fume cupboard. Once these test tubes have been emptied you…
- Comparison between the relative amount of precipitation for soft vs hard water soap test.During the lab procedure a filtered pipette was used to measure out 1.0 mL of the saturated salicylic acid solution. The filter had a bit of cotton on the tip. What component of the mixture was being filtered out?Find the intermediates.show step-by-step solution.
- explain the mechanism of cleansing action of soap.Table 1. Solubility Tests. Functional Group Observations (specify type if any) Sample in concentrated (+/-) H2SO4 Color orange Hydroxyl group Hydroxyl group Hydroxyl group 1-butanol Color orange 2-butanol Color orange diisopropyl ether Look at the structures of compounds tested for solubility in concentrated H2SO4. What generalization can be made for a substance to be soluble in concentrated H2SO4 ?Chemistry 19 9. Make 3 serial dilutions, each generating 400 mL of a 1-in-4 dilution of a 3M stock solution
- Pre-lab question #8: Suppose you were dissolving a metal such as zinc with hydrochloric acid. How would the particle size of the zinc affect the rate of its dissolution? As the particle size of the zinc increases, the rate of dissolution AA (decreases/increases).1. Obtain a 50-ml burette, 5-mL volumetric pipette and a pipette bulb from the stockroom. Setting up the burette and preparing the NaOH 2. Rinse the inside of the burette with distilled water. Allow the distilled water to drain out through the tip in order to ensure that the tip is also rinsed. 3. Now rinse the burette with a small amount of NaOH (aq). To do this, add about 5-mL of NaOH (aq) to the burette, then twirl the burette on its side (over the sink) to rinse its entire inner surface. Then allow the NaOH (aq) to drain out through the tip. M Burette Pipette 4. Fill the burette with NaOH (aq) up to the top, between 0-mL and 5-ml. Use a funnel to do this carefully, below eye-level, and preferably over the sink. After this you will need to flush the tip of the burette - your instructor will show you how to do this. Now measure the volume at the level of the NaOH precisely, and record it as the "Initial Burette Reading" on your report. Also record the exact molarity of the NaOH (aq),…What is the best course of action if solid material remains in the flask after the heating step of a recrystallization? Select one: Allow the mixture to cool, then filter the mixture. Filter the hot mixture. Remove the solid with a spatula. O Redo the heating step of the recrystallization.
