Dissolution is the process that makes solutions. A solution is a homogenous mixture of two or more substances. The solute in the solution is the substance that is dissolved, while the solvent in the solution is the substance that dissolves the solute during dissolution. The question introduced in this lab is “What factors influence the rate at which one substances dissolves in another?” The three factors that affect the rate of dissolution are temperature, how much you stir the mixture, and the particle size of the substances. Temperature increases the chance of solute and solvent particles colliding with one another.
Therefore, K can be determined a true constant. The pH of the solution does not affect the value of the equilibrium constant, K. K is a ratio of the concentrations of the products and the reactants. A change in pH is simply due to a change in the concentration of Hydrogen ions and hydroxide ions. A change in concentration merely causes a shift in equilibrium towards either the products or reactants. It does not however change the value of the equilibrium constant at constant temperature
The formula for sodium acetate is NaC2H3O2, it is quite soluble in water, soluble in ether and slightly soluble in ethyl alcohol. While the chemical compound melts at 622.8℉, it does not have a boiling point for it will decompose. A hydrate is a chemical compound that forms when one or more water molecules are added to the molecules of another substance. Since sodium acetate is a trihydrate (NaC2H3O2·3H2O), it has three molecules of water for every molecule of sodium acetate and because of this, anhydrous sodium acetate quickly transitions into a trihydrate. This is due to sodium acetate being quite hygroscopic, meaning it readily absorbs moisture from the air.
The compound’s empirical formula was determined to be FeK3(C2O4)3•3H2O. With the molecular formula and the balanced equation for the synthesis of potassium trioxalatoferrate (III) trihydrate, stoichiometry revealed potassium oxalate monohydrate was the limiting reactant. The theoretical yield of 6 grams of potassium oxalate monohydrate was
Summary Determining the concentration of a liquid can be a tricky process involving complex procedures if it were not for science’s ability to test a substance’s absorbency through spectrophotometry. The experiment was carried out to discover the concentration of Red Dye #40 in several common soft drinks. The samples of the dye were diluted, and tested using a spectrophotometer. The absorbencies of these samples were then recorded, and a standard line curve with the concentration equation and R2 value was created with these results. Using the absorbencies of the dye samples, the concentrations of the soda samples were determined using the slope equation provided by the graphing software.
Knowing the Interrelationship Between the Consolidation of Sodium Chloride Mixtures and Their Densities Chemistry 1A Lab 5pm Th, Department of Chemistry, California State University Fresno Professor Nimavat Experiment Conducted: 1/25/18 Report Submitted: February 15th, 2018 Alex Luna* and Ellen Introduction: Density is defined as the ratio between mass and volume or mass per unit volume. It is a measure of how much stuff an object has in a unit volume. This report discusses an experiment to find out if there is a correlation between a salt solutions concentration and its density. Conduct 3 separate trials and take data measurements to determine the density of each salt solution. Determine the best procedure for measuring density (Beaker,
In the reaction between potassium iodide (KI), hydrogen peroxide, sodium thiosulfate (Na2S2O3) under acidic condition. Apparatus: The apparatus used in this experiment are as follow: 50cm3 measuring cylinder 25cm3 measuring cylinder 100cm3 beaker White
Meaning that the more acidic to stable of the Hydrogen Ion concentration is the more soluble the bath bomb becomes. This data does not support the original hypothesis of “If bath bombs are designed with different concentrations, then the Sodium Bicarbonate bath bomb design will be the most soluble because Sodium Bicarbonate is a salt and has a high solubility in water.” The data showed that the citric acid and sodium carbonate mixture with an average pH of 6.4 disintegrated in 9 minutes and 19.44 seconds while the sodium carbonate took the longest time to disintegrate at 25 minutes and 27.69 seconds. So clearly the as stability of the Hydrogen Ion Concentration from an acidic solution, the less time the salt mixture takes to disintegrate but when the solution becomes basic the more time the salt mixture takes to
Discussion The ideal Van't Hoff factor for potassium chloride is 2, because the compound dissociates into its ions, K+ and Cl-. The greater the Van't Hoff factor means the more a compound lowers the freezing point temperature of the solvent it dissolves in. For a liquid to freeze it must form a lattice, a three-dimensional arrangement of particles that make up a crystalline solid, and the presence of solute particles interferes with the ability of the solvent particles to form a lattice. To compensate the system must be brought to an even lower temperature to freeze, and the more particles that are present within the solvent, the larger that freezing point depression becomes.3 Thus, the obtained value of 2.05 means that potassium chloride lowered