OBJECTIVE To determine the change of standard Gibbs free energy for the decomposition of sodium hydrogen carbonate (NaHCO3) from the change of standard enthalpy and the change of standard entropy. THEORY Free energy is a state function that expresses the spontaneity of a chemical process in term of enthalpy and entropy change of a system under conditions of constant temperature and volume (Hemholtz free energy) and constant temperature and pressure (Gibbs free energy). It is a quantity of non-pressure-and-volume
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Aim: To react NaHCO3 with HCl to form NaCl and two other products and then calculate the mole relationships between NaHCO3 and NaCl and calculate a balanced equation for this reaction. Safety: • Wear safety goggles at all time • Handle all chemicals with care • Use equipment like tongs when handling warm/hot objects • If chemicals are spilt on self‚ wash off immediately • Stand at all times Hypothesis: The NaHCO3 will react successfully with the HCl and will form NaCl‚ H2O and
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The Aim of the experiment: In this experiment I will investigate the relationship between the concentration of the hydrochloric acid and the rate of a reaction. To find this out I will react different concentration of hydrochloric acid and magnesium‚ from there I will monitor the gas (hydrogen) produced and analyse the results. Prediction: I predict the higher the molarity of the hydrochloric acid the faster the rate of reaction therefore the quicker the gas will be produced in the specific
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Data Table: Record your observations in the following table Na3PO4 NaI Na2SO4 NaCl NaHCO3 Na2CO3 NaOH Co(NO3)2 Precipitated a blue color NR NR NR Turned a milky purple color Precipitated a light purple color Precipitated a light blue color Cu(NO3)2 Precipitated a light blue color Precipitated a dark amber color NR NR Precipitated a light blue color Precipitated a light green color Precipitated a light blue color Fe(NO3)3 Precipitated a light milky yellow color Turned a dark black
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Working out mean or average results 26.3+26.1+23.8= 76.2/3=25.4 The average ml of HCL needed in order to react for a colour change was 26.5ml. NaHCo3+ HCl NaCl+H2O+Co2 Calculation: 25 ml 0.1 mole dm3 26.3+26.1+23.8= 76.2 ml 76.2÷3=25.4÷1000=0.025 volume 0.1x0.25ml=0.025 moles 0.025÷0.254=0.98 (Rounded up to one decimals places) =0.1 M To begin with concentration I have choose three volumes form my results table which I have added them and then divided by three to get an average results. Describe
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Student name : Thi Thuy Trang Nguyen Student ID : 17621579 Human reaction timer experiment ruler The goal of this test was to affirm. Students wear glass have slower reaction times than students don’t wear glass. Beginning with the class was divided into three groups‚ two groups of five students and one group of six students. Each group of students got a ruler from teacher and the result table. The ruler was held
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Rates of Reaction: Hydrochloric Acid + Calcium Carbonate Background Information: Hydrochloric acid is a clear‚ colourless‚ highly-pungent solution of hydrogen chloride (HCl) in water. It is a highly corrosive‚ strong mineral acid with many industrial uses. Hydrochloric acid is found naturally in gastric acid. Calcium carbonate is a chemical compound with the formula CaCO3. It is a common substance found in rocks in all parts of the world‚ and is the main
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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 (III) Nitrate‚ 0.1 M - 2.5 mL in Pipet‚ 1 Nickel (II) Nitrate‚ 0.1 M - 2 mL in Pipet‚ 1 Sodium Bicarbonate
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HCL TECHNOLOGIES In 2011‚ HCLT ERS (Engineering and R&D Services)‚ a division of HCL Technologies‚ a global IT services corporation headquartered in New Delhi‚ India‚ had to devise next year ’s plan for the Engineering Out Of The Box (EOOTB) business concept that it had initiated in 2009‚ which transformed the division ’s ability to create "16 productized solutions" and to engage new and old customers in new revenue services. The productized solutions were heavily reliant upon IT platform-based
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The Effect of the Number of Drops of HCl and NaOH on the Net Change in the pH of Plant‚ Animal‚ and Nonbiological Solutions Research Question: How do plants and animals respond to changes in pH? Analysis Questions: Summarize the effects of HCl and NaOH on the tap water. HCl is an acid and when in tap water‚ dissociates into H+ and Cl-. Since it releases the H+ ion in the tap water‚ it raises the concentration of H+‚ which lowers the pH of the tap water. Unlike HCl‚ NaOH is a base. NaOH is a base because
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