area to volume ratio causing them to act more efficiently than the bigger cells. The smallest cell had a ratio of 1:12 while the biggest cell had a ratio of 1:2‚ leaving a gap of 5:12 causing the bigger cell to act less efficient in absorbing the solution in a period of 10 minutes. Also‚ as the size of the cube increased‚ the surface area increased more quickly than the volume such as the difference between the volume of the biggest (3cm) cube and the smallest cube (0.5cm) was only 26.9 ㎤
Premium Chemistry Concentration Solution
Introduction Recrystallization is a method used to purify solid organic compounds. Using the recrystallization technique‚ a solid compound is dissolved in a solvent and the compound slowly crystallizes as the solution cools. Using a filtration technique‚ a pure solid is produced when the molecules of the impure particles in the compound are excluded from the crystal lattice. After obtaining the pure compound‚ a melting point determination procedure can be done using a mel-temp device to correctly
Premium Solubility Solid Chemistry
The kinetic equation‚ half-life values‚ correlation coefficient and pre-harvest interval (PHI) of the trifloxystrobin and tebuconazole residue dissipation were calculated from the experimental data and summarized in Table 4. The dissipation dynamics of trifloxystrobin on green tea leaves followed a first-order rate equation as follows C = 2.5472e-0.245x (r=0.9797) and C = 6.5457e-0.207x (r= 0.9804) with the half-life of 2.83 and 3.34 days for trifloxystrobin at RD and DRD‚ respectively. The half-life
Premium Water Chemistry Solvent
ODD ONE OUT 1. Find the odd one out. A. Ginger B. Garlic C. Chilli D. Potato ANS-C Explanation Chilli is modified stems 2. Find the odd one out A. Eagle B. Hawk C. Bird D. None of these ANS-C Bird is prey of another bird 3. Find the odd one out A. Credit B. Deposit C. Withdrawl D. None of these ANS-C Explanation Credit and deposit indicates addition in amount while withdrawl indicates reduction. 4. Find the odd one out A. Microscope B. Telescope C. Periscope D. Stethoscope ANS-D Explanation The stethoscope
Premium Potato Concentration Starch
As ice freezes on the concrete‚ it creates a dangerous‚ slick surface. Driveways‚ sidewalks‚ patios‚ and parking lots covered with ice can cause falls‚ making you liable for injuries. So most people rely on deicers such as salt because it does a great job melting ice‚ but it also damages concrete surfaces over time. How does salt damage concrete surfaces? Salt lowers the pH balance in the concrete. Because it is acidic‚ it weakens the strength of the concrete and increases the sizes of the pores
Premium Water Oxygen Chemistry
Ever wondered how ice skating works? Why the ice is slippery? Or just how to maintain enough balance to speed up? Well this article will explain why. Ice skating works because metal skate blades glide with very little friction over a thin layer of water on the ice surface. At one time‚ scientists thought skaters created the water layer by melting the surface layers of ice through the pressure of their body weight creating a melting point.. However‚ recent studies disproved that explanation and it
Premium Water Oxygen Chemistry
Water has polarity. Polarity is the uneven distribution of charge. Water has cohesion‚ adhesion‚ and heat capacity. Cohesion is the attraction between molecules of the same substances. Adhesion is the force of attraction between molecules of a different substances. Heat capacity is the amount of heat it takes to raise temperature of a substance. The experiment displayed shows water can have adhesion and cohesion. The hypothesis of this experiment is if a nonpolar substance is added to water
Premium Water Temperature Thermodynamics
EXPERIMENT 5 SEPARATION OF A MIXTURE INTO ITS COMPONENTS BY FRACTIONAL CRYSTALLIZATION Introduction: Fractional crystallization is one of the experimental techniques used to separate or purify mixture. Fractional crystallization makes use of the differences of solubility to separate the components of a mixture. Goals: Applying fractional crystallization to separate a mixture of salicylic acid and copper sulfate pentahydrate into its components. Calculate the percent of salicylic
Premium Solubility Solvent Ethanol
Blubber is the fat on an animal often found in colder climates that keeps its internal body temperature stable. By experimenting with multiple different models of handmade blubber‚ it was discovered that using petroleum jelly‚ tin foil‚ and playdough got the best results. It was originally believed that Crisco would work the best because of its thickness and texture‚ but in reality‚ the temperature went down on average 7.75 degrees Celsius each time which was too much from our original temperature
Premium Water Temperature Nutrition
After the dialysis tubing soaked in the distilled water overnight‚ the measurements showed that the dialysis tubing increased in mass. The initial weight of the dialysis tubing was 19.08 grams‚ but it went up to 19.34 grams after sitting in the distilled water for some time. The amount of distilled water in the beaker also decreased. There used to be 200 mL of distilled water in the beaker‚ but it decreased to 199 mL after the dialysis tubing soaked in it. The data collected supports the claim that
Premium Water Dialysis Chemistry