Procedure: 1. Fill a beaker two-thirds full of water and add approximately 20 drops of IKI. Write down the solution's color and record the mass of the bag. 2. Do an initial Benedict's test on the 15% glucose/1% starch and the beaker solutions for glucose by putting some of the solution and a roughly equal amount of blue Benedict's solution in a test tube, placing the test tube in boiling water for 90 seconds, and observing whether or not the solution changes color from blue.
Dip the strip in the milk, Wait five seconds, Record Data 6. Now add a few drops of each acid or base to each cup 7. Dip a new glucose a strip and record your data 8. Add a few drops of enzyme to each cup 9. Use a new glucose strip and record Data: Conclusion: According to my data, pH levels do, in fact, affect the results of Lactex.
The two unknown solids are weighed to a mass of 0.15g each. The unknown solids are dropped carefully into the corresponding Erlenmeyer flask wit 50mL of distilled water. The solid in the water must be dissolved and afterwards add 10 drops of Bromecresol green to indicate the change of color when the solution has been titrated. The flask should start with a blue tint. HCl is carefully dropped into the Erlenmeyer flasks with the primed pipette until the solution turn to a green tint.
Glucose levels were measured at 0.52, 0.57, and 0.67 showing that an increase in surface area corresponded with a non-significant (p=0.096) increase in the glucose diffusion rate. Introduction Diffusion is the random movement of substances from an area of higher concentration to an area of lower concentration (down a concentration gradient) and this occurs to stabilize the cell (Kaisa, 2011). Diffusion occurs until the particles are completely evenly distributed. Several factors can alter the diffusion rate of substances, but specifically several factors can influence the diffusion rate of glucose from potatoes. Changes in temperature, surface area, soaking time of the samples, and many other factors may influence the diffusion rate of glucose.
C6 H12 O6 = 2C3 H6 O3 + 2ATP (lactate) This is a structure of ATP ATP contains sugar which is Ribose, a base which is Adenine and three phosphate groups. Biological systems transfer the energy in glucose to ATP because unlike glucose ATP releases its energy instantly in a single reaction and also the hydrolysis of ATP releases a small amount of energy, ideal for fuelling reactions in the body. Glucose is obtained from food; we eat pasta which is a carbohydrate which is then broken down into glucose by the digestive system. The process which breaks this down is known as catabolism, this is the breakdown of food components, breaking down
On the other hand, the most amount of foam will be produced when yeast is reacted with the hydrogen peroxide with a higher concentration (in this experiment’s case, highest being 3.0%), signifying a faster rate of reaction when the substrate concentration is higher. With this, it is predicted that as the concentration of the substrate increases, so does the rate of reaction. | | Scientific explanation for
This is an exothermic reaction, meaning that when energy is put in, more energy is given off. The formulae of the alcohols that I will be using are. Methanol CH3OH Ethanol C2H6O Propanol C3H8O Butanol C4H9OH Pentanol C5H11OH Prediction: I predict that the more bonds there are holding the carbon, oxygen and hydrogen atoms together; more energy will be required to break them apart. For example Ethanol has the formula C H OH. In this formula you have five C-H bonds, one C-C bond, one C-O bond and one O-H bond.
The resulting product was [Co(NH3)5Cl]Cl2 and yield was 4.453g (.017 mol, 84.8%) Distilled water (25mL) was added to concentrated ammonia (5mL) in a 125mL Erlenmeyer flask. The reaction was heated and stirred, then [Co(NH3)5Cl]Cl2 (.0060 mol) was added to the solution. The reaction mixture was vacuum filtered, and the filtrate was cooled in an ice bath. 6M HCl was then added until the solution was neutral to litmus. NaNO2 (.0217 mol) was added to the solution and was allowed to react for five minutes.
Hypothesis With increasing temperature of sodium thiosulphate the reaction rate will increase as well. Justification As the collision theory states for a chemical reaction to occur particles need to collide at a certain speed and angle. Increasing the temperature gives particles more energy, so they move faster. As they move faster more collisions happen, hence more successful collision, which increases the rate of the reaction1. Materials> Hydrochloric acid HCl(l)> Sodium triosulphate Na2S2O3(l)> 250 ml3 beaker> 50 ml3 conical flask> 2 x 25 ml3 measuring cylinder> Thermometer> Stop clock> Tea kettle> Blank card> Pen Variables Reaction time is the dependent variable, as it depends on the temperature of the solution.