ACIDS‚ BASES AND SALTS 1. What are indicators? What are the different types of indicators? An indicator is a dye which changes colour when put into an acid or a base. The different kinds of indicators are- Natural indicators- Litmus is a natural indicator‚ litmus solution is a purple dye which is extracted from a plant called lichen. Litmus turns red in acidic solutions and blue in basic solutions. Other
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Lab #5 Chemical Reactions & Balancing Equations Objectives Observe and classify several chemical and physical changes. Give evidence for the occurrence of a chemical reaction. Write a balanced equation for a chemical reaction. Identify a reaction as a combination‚ decomposition‚ replacement‚ or combustion reaction. Background Physical properties can be observed without changing the chemical composition of the substance. Common physical properties that can be measured without changing the chemical
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solution on the space provided. Box your final answer/s. (10pts each) Determine the molar mass of the following: a. Al(NO3)3 b. ZnSO4 c. Ba(C2H3O2)2 d. NaHCO3 CH3COOH Calculate the percentage oxygen in the following compounds: a. Na2CO3 b. BaSO4 c. BaO d. Al2O3 e. H2SO4 Determine the empirical formula and the molecular formula of a compound containing 40.0% C‚ 6.7% H and 53.3% O. The molecular weight of the compound is 60.02g. Calculate the percentage composition
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varieties (used for bananacue); have Vitamins A‚ B and C • Saba banana (Musa acuminate x Musa balbisiana) : a triploid hybrid (ABB) banana cultivar originating from the Philippines • Soda Ash: a common name for the compound sodium carbonate (Na2CO3).
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Solution Review Complete all questions in this package. Be careful to use correct significant figures and units for any calculation problems. For all chemical equations use phase subscripts. Concentration 1. Calculate the concentration of the solution formed when 23.61 g of sodium phosphate is dissolved in 475.0 cm3 of water. 2. What volume of water is needed to dissolve 85.8 g of silver nitrate to make a 2.650 M solution? 3. What mass of magnesium sulphate is needed to make 1500
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West Indies Alumina Company (WINDALCO)‚ formerly Jamalcan‚ is a joint venture between the UC Rusal and the Government of Jamaica. UC Rusal is the majority shareholder (93% stake) and manages the joint venture. The Government of Jamaica owns the remaining 7% share. Windalco comprises two alumina plants – Ewarton Works in St. Catherine and Kirkvine Works in Manchester. Alumina is a fine white material similar in appearance to salt. The Bayer process dissolves the aluminum component of bauxite
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Permanent Water Hardness of Water Sources from PSHS-IRC by Indirect Titration Researchers Anna Marie S. Cabatbat Crystal Jill R. Mangsat Jan Michael Maturan Charlene Lou A. Nicer Arian Paul D. Norcio Submitted to the Faculty of the Philippine Science High School – Ilocos Region Campus in partial fulfillment of the requirements for Science and Technology Research 2 March 2013 ABSTRACT This study aimed to determine the permanent water hardness in terms of calcium carbonate
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The unknown soda ash from experiment 3 was used‚ to determine the weight for each trial we used the equation of (M of HCl) x (18 ml x 105.99) / (10 x 2 x Na2CO3 ). Which was equal to (0.01472 M) x ((18 mL X 105.99)(10 x 2 X 2.428 % )= 0.6 g. To start we had to rinse the beakers‚ electrode and the stirring bar with diluted water. The sample we needed was weighted to the closest 0.1 mg which we got was 0.3 for the first trial. The sample was transferred to a 250 mL beaker and dissolved in 70 mL of
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Joseph Sulaiman Alya Abourezk 4/13/12-4/14/12 Class Action Lab Report Purpose: To determine‚ through observations‚ the identity of substances produced in a chemical reaction. Materials: Safety Goggles Stirring rod Magnesium ribbon Solid CuSO4•H2O Matches Test tubes Copper metal 3M HCl Red and blue litmus strips 0.1M AgNO3 Zinc metal 0.1M Pb(NO3)2 Test tube holder 0.1M KI Bunsen burner 0.1M Na2NO3 Crucible tongs 1.0M NaOH Water (H2O) 0.1M Ca(NO3)2 50mL beaker
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your student information card Additional Question Guidelines: Include the answers to the additional questions below in your lab report. F. Lets say we decided to run this experiment again. This time we used 1.0 gram of CaCl2·2H2O and 1.0 gram of Na2CO3. a)How many grams of CaCO3 would we produce? Please show/explain how you found your answer.
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