PURPOSE: To see which solutions are soluble and which are not. We were able to see this by mixing certain solutions together and observing changes that occurred. PROCEDURE: 1 Cotton Swabs‚ 1 Sheet each of white and black paper‚ 1 Distilled water‚ Goggles-Safety‚ 1 Well-Plate-24‚1 Well-Plate-96‚ Bag-CK1 1 Pipet‚ Empty Short Stem‚ Experiment Bag Ionic Reactions 1 Barium Nitrate‚ 0.1 M - 2 mL in Pipet‚ 1 Cobalt (II) Nitrate‚ 0.1 M - 2 mL in Pipet1 Copper (II) Nitrate‚ 0.1 M - 2 mL in Pipet‚ 1 Iron
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Abstract The photocatalytic degradation of phenol has been tested primarily with titanium dioxide (TiO2) either alone or in combination with other materials. In this work‚ Mg/Al hydrotalcites prepared by two methods using inorganic (HC) or organic (HS) chemical reagents‚ along with mixed oxides produced by calcination of these products (HCC and HSC) were mixed with titanium isopropoxide to obtain hydroxide-TiO2 compounds (HCC-TiO2 and HSC-TiO2) to test their photocatalytic activity compared with
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we used 5/1 instead of 1/5 as the molar ratio‚ then we will get this answer. Subchapter – Moles‚ Molecular Weight 23. A sample of soda ash contains 50% Na2CO3 (106 g/mol) by weight and the other 50% are inert substances. What mass of CO2 (44 g/mol) is formed when 11 g of the soda ash reacts with excess HCl according to the reaction below? Na2CO3 + 2 HCl → 2 NaCl + H2O + CO2 A. 4.6 g B. 242 g C. 2.3 g D. 5.5 g Correct Answer – C: 2.3 g Explanation: C: 2.3 g To calculate for the amount
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Laundry detergents are found in every household and used for removing stains and oils from clothes so they could be reused. The production of this invention first started in the United States in the 1930s but started becoming very popular only after the Second World War because the military required a chemical to remove the dirt and oil off their military outfits (Clean Living). Laundry detergents have a combination of chemicals which combat different barriers to clean the fabric. They have different
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Salmonella enterica (#11) Gram Negative Organism | CarbohydrateFermentation(PRL) | CarbohydrateFermentation(PRG) | Indole productionTest | MethylRed Test(MR) | VogesProskauer Test | Citrate Utilization Test | Hydrogen sulfide Test | Urease Test | CatalaseTest | Salmonellaenterica | (-)Red color | (+)YellowColor | (-)No red ring | (+)RedRing | (-)No pink | (+)Blue With growth | (+)Black PrecipitateVery motile | (-)No change in color | (+) | The unknown organism (#11) was Salmonella
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g/mol Identity of M2CO3 Percent error % 1. From the mass of CaCO3‚ calculate the moles of CaCO3 precipitated. 2. Calculate the molar mass of the unknown 3. Calculate the molar mass of the following Group 1 metal carbonates: a. Li2CO3 b. Na2CO3 c. K2CO3 4. What is the identity of M2CO3? 5. Calculate the
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and “hypotonic”? What is the relationship between the size of a molecule and its rate of diffusion? ____________________________________________________________________________ Supplies ► Materials Needed Active Transport: Baker’s Yeast 0.75% Na2CO3 0.02% Neutral Red Erlenmeyer Flasks
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Sodium hydroxide‚ also known as caustic soda‚[2][3] or lye‚ is an inorganic compound with the chemical formula NaOH (also written as NaHO). It is a white solid‚ and is a highly caustic metallic base and alkali salt. It is available in pellets‚ flakes‚ granules‚ and as a 50% saturated solution.[citation needed] Sodium hydroxide is soluble in water‚ ethanol and methanol. This alkali is deliquescent and readily absorbs moisture and carbon dioxide in air. Sodium hydroxide is used in many industries
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Worked solutions to student book questions Chapter 2 Analysis by mass Q1. a b Why was the soup sample in Worked Example 2.1 heated to 110°C? Why was it necessary to weigh the sample four times? A1. a b The soup was heated above 100°C to evaporate water from the sample. By repeatedly heating the sample until the mass remained unchanged‚ the analyst could be sure that all the water had been removed. Q2. Some laboratories use microwave ovens in place of conventional ovens to
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Lab #24- Preparation 4-Methylcyclohexene Introduction: The goals in this lab were to have a reaction occur with 4-methylcyclohexanol and an acid catalyst to form our product of 4-methylcyclohexene via an E1 reaction. This reaction is accomplished by removing the –OH group on 4-methylcyclohexanol via dehydration and to have a double bond form via a loss of a hydrogen on a β-Carbon. Many techniques and skills were developed in this lab. Among them were dehydration‚ isolation‚ drying
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