methyl orange indicator. Test another 3 drops of sodium hydroxide with phenolphthalein indicator and another 3 drops with bromthymol blue indicator. III. Data and Results Data: 1. Properties of acids Properties | CH COOH | HCL | H SO | Calamansi Extract | Carbonated Drink | Color with blue litmus | RED | RED | RED | RED | RED | Color with red litmus | RED | RED | RED | RED | RED | Color with methyl orange |
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AlBr3 Aluminum (III) Bromide 9 KMnO4 Potassium Manganate (VII) 10 Cu(OH)2 Copper (II) Hydroxide 11 FeSO4 Iron (II) Sulfate 12 NH4Cl Ammonium Chloride 13 ZnCO3 Zinc Carbonate 14 SnF2 Tin (II)Fluoride 15 MgSO4 Magnesium Sulfate 16 MnO2 Manganese (IV) Oxide 17 Ca3(PO4)2 Tricalcium Phosphate 18 NaOH Sodium Hydroxide 19 HCl Hydrogen Cloride 20 Ba(HSO3)2 Barium Bisulfite 21 HNO3 Hydrogen Nitrate 22 FeSO3 Iron (II) Sulfite 23 Al2S3 Aluminum Sulfide 24 KNO3 Potassium Nitrate Part
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fruit’s spoilage‚ were tested on the KaBaPine combination. The test results revealed that there was no significant difference between the voltage produced by pure KaBaPine and those produced by KaBaPine combined with basic or acidic solutions. Using zinc containers of old size C dry cell the contraptions were constructed. The KaBaPine was placed inside as the new electrolyte. The copper wire was soldered to the base of the cap and was used to seal the cell to replace the carbon rod in common dry cells
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Group II (conc H2SO4 group) – Cl(chloride)‚ Br- (bromide)‚ I- (iodide)‚ NO3- (nitrate)‚ CH3COO- (acetate)‚ C2O42(oxalate): Salt + conc H2SO4 1. No reaction: Group II anion not present. Continue to group III. 2. Chloride: Colourless white pungent fumes (HCl); intensify when glass rod dipped in NH4OH is brought near mouth of test tube 1. Silver nitrate test: WE + AgNO3 = white ppt soluble in NH4OH 2. Chromyl chloride test: Salt + solid K2Cr2O7 + 2-3 drops conc H2SO4 = orange / red fumes of chromyl chloride
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Chemistry 200 Exam 1 Review Problems 1. Calculate the number of atoms in 10.0 grams of Fe. 2. Give the mass number‚ #protons‚ #neutrons and #electrons for the isotope strontium-88. 3. Calculate the number of moles of carbon in 50.0 g of benzene C6H6 4. A substance is found to be 38.7 % C‚ 9.7 % H and 51.6 % O by mass. Its molar mass is 62.1 g/mole. What is its molecular formula? 5. Name the following: a) Ca(OH)2 b) KCN c) HClO4(aq) d) FeSO4 e) Na2O f) SF6 g)
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HC2O4- (( H+ + C2O42- Ka2 H2C2O4 Cu2+ + C2O42- (( CuC2O4 1/Ksp CuC2O4 2(OH- + H+ (( H2O) 1/K2w Net Keq = (Ksp Cu(OH)2 x Ka1 x Ka2 )/Ksp CuC2O4 = 1.969 x 10-2 c. pinch of Zinc dust Cu(OH)2(s) (( Cu2+(aq) + 2OH-(aq) Ksp Cu(OH)2 Zn2+((Zn(s) 1 Cu(s)(( Cu2+ 1 Zn2+ + 2OH-(( Zn(OH)2 1/Ksp Zn(OH)2 Net Keq = Ksp Cu(OH)2/ Ksp Zn(OH)2 = 1.196 x 10-6 d. 6.0M HNO3 Cu(OH)2(s)
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always travel from hot to cold objects and two objects will reach an equilibrium temperature. Materials and Methods 1. Oven 7. Test Tube 2. Pasco Temperature Probe 8. Stopper 3. Scale 9. Calorimeter 4. Samples of Metals 10. HCl solution 5. Water 11. NaOH solution 6. Beaker The sample metals are put to boil. In the first trial‚ the investigators use sample metal #2. Pour an amount of distilled water in the beaker and measure. After obtaining the mass/weight of the
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QUALITY CONTROL LABORATORY Mam Dawn Assay of HCL Aqueous Alkalimetry Direct titration 0.1N NaOH Methyl Red TS HCL + NaOH NaCl + H2O Assay of Diluted H3PO4 Aqueous Alkalimetry Direct titration 0.1N NaOH Thymolphthalein TS H3PO4 + 2NaOH Na2HPO4 + 2H2O Assay of H3BO3 Aqueous Alkalimetry Direct titration 0.1N NaOH Phenolphthalein TS H3BO3 H+ + BO2- + H2O
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Self-assessment practice tests Test 1 – Material from Chapters 2–4 | 45 minutes 1 The kinetic theory suggests different arrangements for the atoms or molecules in the three states of matter. The diagrams below show how evidence suggests the particles are arranged in the three states of matter. 1 2 3 What are the three states shown? 1 A B C D 2 gas liquid solid liquid 2 liquid gas liquid solid 3 solid solid gas gas The graph shows the heating curve for a metal that is solid at room temperature (25
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Yuri Anthony D. Sucgang BMLS-IA Electrophoresis Machine Gel Electrophoresis Apparatus(Aragose Gel) Electrophoresis is the motion of dispersed particles relative to a fluid under the influence of a spatially uniform electric field. Gel electrophoresis is a laboratory procedure used to separate biological molecules with an electrical current. In this lesson‚ we’ll review how agarose gel electrophoresis works and introduce the equipment necessary to perform an electrophoresis experiment.
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