and Ni (NH3)62+. Data and Data Analysis: • Ca(OH)2 [pic] Ca2+ + 2 OH- Data: You will first add 6 drops of Ca( NO3)2 to a watch glass. Then add 6 drops of HCl then add 6 drops of NaOH. Analysis: Ca( NO3)2 ‚a white milky solution‚ 6 drops of an acid such as HCl is added which turns colorless‚ and the Ca2+ becomes less soluble‚ which shifts the equilibrium to the right by removing the OH-. After adding the NaOH to the solution turns back to the
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Buffer Preparation (Gozani Lab) 1. 1 M Tris-HCl Buffers pH Volume (L) TrisBase (g) HCl (ml) pH 7.0 2 242.2 150-155 pH 7.5 2 242.2 120-125 pH 8.0 2 242.2 80-85 Autoclavable. 2. EDTA 0.5 M (pH8.0) 0.5M‚ 1L: 148 g EDTA + ~30-40 g NaOH to adjust pH (or 186 g EDTA-Na.2H2O + ~20 g NaOH) Note: pH adjusted by NaOH is essential for solubility. Autoclavable. 3. TAE DNA Electrophoresis Buffer (50 X) (2 M Tris‚ 50 mM EDTA) 2L 484 g Tris 114.2 ml glacial acetic acid 200 ml 0.5 M EDTA 8.0 To make
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and ointment 5. Nutritional Powder 6. Cream paste and ointment 7. Tablet and capsule 8. Fridge item 9. Infusion Vials Brand Name Generic Name Dosage Form Strength Classification Indications Expiry Date Endopine Cefipime HCL Inj 500mg Anti-biotic Infection of urinary and lower respiratory tract infection‚Pneumonia 06-16 Clafron Ceftriaxone sodium Inj .5gm Anti-biotic Enteric fever‚ intra-abdominal infection‚ bone and joint infection 02-14 Clafron Ceftriaxone
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flask add 35 ml of an Unknown HCl solution. Step 2: Add an indicator to the acid‚ select the flask and add 2 drops of phenolphthalein indicator. The indicator menu is available under the chemicals main menu (ChemicalsIndicators) or the context menu. Step 3: Fill buret with NaOH‚ obtain a 50 ml buret and fill with .100M NaOH solution. Step 4: Titrate NaOH into HCl until end point‚ record initial buret volume and add NaOH (quickly at first then slowly) until the HCl solution turns pink and record
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place 2 drops of butan-1-ol in the first tube‚ in the second place 2 drops of butan-2-ol‚ and in the third place 2 drops of 2-methylpropan-2-ol. 2. Carry the test tube rack to the fume food‚ and use a clean dropper to add 10 drops of concentrated HCl to each of the three test tubes. Shake the mixture very gently and carefully. Return to your lab bench with the test tube rack. 3. Allow the tubes to stand for 1 minute and observe for evidence of cloudiness. Also note the time it takes for any
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dissolve the .15g of the first unknown substance into the water. Once the substance has dissolved‚ the student will add 10 drops of bromocresol (indicator) into the beaker. After the student will fill the buret all the way up with HCl. Once that is done‚ begin titration. The HCl should be added into the beaker until the indicator turns green. After it turns green the student will then place it on a hot plate and heat it till the CO2 evaporates and it turns blue again. After that let it cool. Once the
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Exp 23 B Synthesis of t-Pentyl Chloride 11-8-12 Purpose: The sysnthesis of t-Pentyl Chloride from alcohol. Procedure: Preparation of t-Pentyl Chloride. In a 125-mL separatory funnel‚ place 10.0 mL of t-pentyl alcohol (2-methyl-2-butanol‚ MW _ 88.2‚ d _ 0.805 g/mL) and 25 mL of concentrated hydrochloric acid (d _ 1.18 g/mL). Do not stopper the funnel. Gently swirl the mixture in the separatory funnel for about 1 minute. After this period of swirling‚ stopper the separatory funnel and
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Experiment One Basic operation Laboratory rules 1) Prepare a lesson carnestly before the experiment. Clarify the related basic principle‚ sequence of the operation‚ and safety measures in the experiment. 2) Put on the working clothes before entering the laboratory. Record the experimental phenomena and data. 3) Keep the floor neat. Don’t throw anything into the water trough so as to avoid stops up. 4) After every experiment‚ the students being on duty shall take responsibility for cleaning
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set-up of the glass tube test used two cotton balls of the same size. One cotton ball is moistened with hydrochloric acid (HCl) and the other one is moistened with ammonium hydroxide (NH4OH). The two cotton balls were inserted in both ends of the glass tube. NH4OH which has a lighter molecular weight (35.0459 g/mole) diffused with a faster rate (dave=20.25cm) as compared to HCl which has a greater molecular weight (36.4611g/mole) and diffused with dave=16.38 cm. A white ring of smoke formed closer
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strength of an acid is based on the concentration of H+ ions in the solution. The more H+ the stronger the acid. Example: HCl (Hydrochloric acid) in water Characteristics of Acids: **Acids taste sour **Acids react strongly with metals (Zn + HCl) **Strong Acids are dangerous and can burn your skin Examples of Acids: 1. Vinegar 3. Citrus Fruits 2. Stomach Acid (HCl) II. Bases *Bases are ionic compounds that break apart to form a negatively charged hydroxide ion (OH-) in water
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