using the mortar and pestle. Carefully measure 1 g of the powder using the balance and place this powder in a small beaker. To the powder‚ carefully add 50 mL of tap water. 4) Carefully add 4 drops of thymol blue to the beaker. Do not forget to add indicator since you will not see a color change if you do not add it! 5) Carefully insert the calibrated probe into the mixture. Take a pH reading. This is your first reading at 0 drops of HCl. 6) Carefully add 25 drops of HCl into the beaker while stirring
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conical flask · 50cm3 burette · 100cm3 beaker · 25cm3 pipette · Pipette filler · Plastic pipette · Small filter funnel · Balance · Distilled water · Sulphuric acid · 2.650g of sodium carbonate · Spatula · White tile · Methyl orange indicator Method · I will make a solution where the solute will be the sodium carbonate and the solvent will be distilled water. · I will first measure the weighing bottle on its own without the lid on. · I will then make the weight of the bottle equal
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mixture does not boil dry. 7 Neutralize the mixture by adding dilute sodium hydroxide‚ drop by drop‚ using a pipette. Test the pH of the mixture after each addition by dipping a glass rod into the liquid and touching it to a sheet of universal indicator paper. Continue adding drops of sodium hydroxide until the mixture is neutral (pH 7). 8 Pour the mixture into a petri dish and use a glass rod to ensure it is evenly spread over the surface. Allow to dry overnight on a sunny windowsill or radiator
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Metrics-Based Performance Monitoring Ric Bryant‚ PE‚ CMRP Fluor Corporation Metrics-Based Performance Monitoring How are you doing? • • • • Where do we want to go? Where are we now? Where are we going? What direction? How fast are we going? 1 Our Organization Where do we want to go? – What are our company’s business goals? – Are they good goals? Where are we now? – Are we achieving our company’s business goals? – How does the outside world affect us? Where are we going? What direction? –
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Chemistry Lab: Hydrolysis of Salts Name_____________________________________________________Date__________________ New Concept: Hydrolysis Reactions Review Concepts/Application: Writing chemical formulas‚ writing ionic equations‚ determining solubility‚ measuring acidity and basicity. Pre-Lab Discussion A salt is an ionic compound containing positive ions other than H+ and negative ions other than OH-. Most salts will dissociate to some degree when placed in water. In many
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Name: |Date:| Exp 1: Observations of Chemical Changes|Lab Section: | Data Tables: Part 1: |Chemicals|Well No.|Observations of the Reaction| A.|NaHCO3 + HCl| H12|White and bubbled slightly and settled down to smaller smaller bubbles| B.|HCl + BTB| H11|Golden yellow; looked darker under the black paper| C.|NH3 + BTB|H10 |Dark blue| D.|HCl + blue dye| H9|Greenish color| E.|Blue dye + NaOCl| H8|Blue and lighter than NH3+BTB solution color| | with the 1 drop of HCl| H8|Turned blue green
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by determining the concentration of HCl in the water. • Using a pipette and pipette filler‚ we accurately pipetted 25 cm3 of 0.010 mol dm-3 sodium hydroxide solution into a conical flask. • Then we added a few drops of methyl orange indicator and placed it on the white tile. This solution was then titrated with the water obtained from the river. • After we stood the burrette up using a stand and clamp. • We then filled up the burrette to approximately the 0.00 mark with the
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Investigating the effects of acid rain in the growth of cress seedlings IntroductionAcid rain is rain or any other form of precipitation‚ which is unusually acidic. It has harmful effects on plants‚ animals and buildings. Acid rain is mostly caused by human emissions of sulphur and nitrogen compounds which react in the atmosphere to produce acids. Acid rain can slow the growth of vulnerable forests and cause leaves and needles to turn brown and fall off. In addition‚ it depletes minerals from the
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AVIATION 111 PRIVATE PILOT GROUND SCHOOL Spring 2013 5.0 CREDITS Instructor: Mark Richardson Phone: 253-833-9111 ext. 4708 Office Hours: 11:00 - 12:00 Monday-Thursday TC 129 Email: mrichardson@greenriver.edu Course Description: Includes aerodynamics‚ navigation‚ weather‚ communications‚ regulations‚ flight physiology‚ weight and balance and other subjects preparatory to the FAA Private Pilot written exam. Materials For Course: Text: Pilot Handbook of Aeronautical
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ammonia and turns suspended litmus paper blue‚ NH4+ is present. Sample Solubility and Solution Tests *For DIW-soluble sample‚ dissolve about ½- 2/3 of sample in about 10-15 mL DIW. pH Test Fill several vials with solution‚ and determine pH using indicators (starting with HBtB) pH 1.5: HSO4- must be present‚ and OH- must be absent pH about 2-2.5: SO42- may be present in mixture‚ but not in pure substance pH 3-3.5: OH- not present pH 5-6: NH4+ present pH 7: Cl-‚ NO3-‚ SO42-‚ K+‚ and/or Na+ could
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