n (3) Solutions of aqueous sodium hydroxide and hydrochloric acid react to form water and aqueous sodium chloride. co NaOH(s) → Na+(aq) + OH–(aq) ∆H1 = ? Chemistry with Vernier py In this experiment, you will use a Styrofoam-cup calorimeter to measure the heat released by three reactions. One of the reactions is the same as the combination of the other two reactions. Therefore, according to Hess’s law, the heat of reaction of the one reaction should be equal to the sum of the heats of reaction for the other two.
Write a hypothesis on what you think will happen when mixed. 3. Combine the substances; record observations. Hydrochloric Acid and Magnesium 1. Add hydrochloric acid to a test tube.
CuSO4 4. What is the molar mass for anhydrous (without water) copper(II) sulfate? 159.62 g/mol Result: Observation: Some gray white substances precipitated from the water in the crucible. Data: * Mass of purified crucible and lid 30.59g * Mass of crucible and lid and hydrate 31.57g * Mass of hydrate alone 31.57g- 30.59g = .98g * Mass of crucible and lid and dehydrate 31.11g * Mass of dehydrate alone .52g This lab shows that hydrates are made up of crystal solids and water,
(d) What evidence suggests that nitrate compounds are soluble in water? (e) Write the chemical formula for each precipitate that formed. Apply and Extend (f) Write a balanced chemical equation for each precipitation reaction that occurred. (g) Why is it necessary to use distilled water to prepare the solutions used in this investigation? (h) "Hard" water contains a high concentration of calcium ions.
The formula for the hydrate is written as BaI2 • 2H2O And it is named barium iodide dihydrate. Mole conversions (DRAW) Nomenclature Help: B: -3 C: -2 N: -1 Cl: -1 Br: -1 I: -2 S, Se, Te: -2 P, As: -3 Si: -4 PER adds one
An aqueous solution of ammonium sulfate is allowed to react with an aqueous solution of lead(II) nitrate. Identify the solid in the balanced equation. A) (NH4 )2 SO4 B) Pb(NO3 )2 C) PbSO4 D) NH4 NO3 E) There is no solid formed when the two solutions are mixed. ____ 11. An aqueous solution of sodium carbonate is reacted with an aqueous solution of calcium chloride.
The synthesis of NaCl further identified the ionic compound by reacting sodium hydroxide and hydrochloric acid and obtaining solid sodium chloride. The synthesized compound formed was used to perform another flame test and the chloride anion test, which further solidified the identification of NaCl as the ionic compound. Introduction The purpose of the experiment was to identify unknown ionic compound
You will be given an unknown amino acid. It could be any of the amino acids in any ionic form. Weigh out about 400 mg of the unknown, recording the mass to the nearest milligram, and dissolve it in 20 mL of H2O. Set up the electrodes of the pH meter, a magnetic stirring bar and stirring motor, and a burette as shown in Figure 1. Take extreme care to see that the electrodes are not damaged by the stirring bar or by rough treatment.
Chemistry: Molarity and Stoichiometry Directions: Using the definition of molarity, the given balanced equations, and stoichiometry, solve the following problems. Please submit your work via the link provided. 1. Calcium hydroxide (“slaked lime”) and sulfuric acid react to produce calcium sulfate and water according to the following balanced equation: Ca(OH)2(aq) + H2SO4(aq) ⋄ CaSO4(s) + 2 H2O(l) a. How many liters of 0.2 M calcium hydroxide do you need in order to have 6.0 moles of calcium hydroxide?
Standard Molar Volume The ultimate goal of this lab was to find the standard molar volume of hydrogen gas (H2). An unknown sample of metal to 3M H2SO4 and an eudiometer filled with water. The dense acid sank towards the bottom to react with the metal sample and form Hydrogen gas. The gas raising to the top of the container caused the pressure in the eudiometer to increase, which lead the water to be displaced. | Trail 1 | Trial 2 | Code | Skinny | Skinny | Mass of Metal | .041g | .027g | Temperature of Water | 296k | 296k | Vapor of Water Temperature | 21.1 mmHg | 21.2mmHg | Barometric Pressure | 76.632cm | 76.632cm | Volume of H2 collected | 29.15mL | 29.2mL | Height of Supported H2 column | 23.95cm | 23.15cm | After the O2 gas had fully reacted, measurements of mass, temperature, vapor, and H2 collected (as shown in the table above) .