Temperature: In this experiment, we will examine how the temperature affects the decomposition rate of a cough drop in water. There will be 3 different temperatures (cold, warm and hot) and all of the three experiment will be performed at the same time. Equipment: 3x Hot plates 3x Magnetic stirrers 3x 150 mL beakers 3x Cough drops 3x
For example whip cream is white so if you add food coloring four drops and mix it up, that is a chemical reaction. Gas molecules expand in the space they're in and if there is no top they will expand out of the container
The purpose of this experiment was to identify two unknowns and their ratios in a given mixture. The identities of the unknowns were two of either acetone, methanol, hexane, cyclohexane, heptane, toluene, or ethyl benzene. Distillation Distillation is used to remove impurities from a mixture – one component of which must be a liquid. Boiling points are utilized in determining the identity of the unknowns. Types of distillation include
Introduction During this lab, students observed that not all substances dissolve at the same rate. Many factors involved including the independent and dependent variables affect how distinct substances dissolve. Overall, the chemical reaction, “the amount of reactant that changes the product in a given time”, played an important part in this experiment, when proven how a substance can change into another element by either emitting or absorbing energy. (Tro, 2018).
Methodology: The method and materials used in this experiment are in accordance with the Heinemann Chemistry 1, Skills Assessment, Practical Activity 9. Results: Substance Mass (g) Copper(II) oxide 2.00g Evaporating dish 50.61g
These results were worthwhile as it can be useful to assist high-intensity endurance athletes to maintain peak performance through hydration. In these events, liquids are not readily available so it is useful to know which liquid evaporates the slowest so that they can get the most out of a liquid, and hence the hydration out of that given drink, in this case, it is Salt Water. It's also useful to assist people when exploring deserts or hot countries like Australia. In hot climates, liquids evaporate faster as more energy is present. This experiment is useful for tourists, so that they know to stay hydrated and make sure they are always covered in any situation in the areas of hydration.
Drippy Drop then was picked up by a flower, while the flower was blooming. Transpiration then occurred, Drippy Drop evaporated out of the flower where it would eventually reach the sky. A day later Drippy Drop reached the sky, condensation made Drippy Drop cool, and he turned to a liquid. Drippy Drop then came together with other water droplets and even some
The purpose of this lab was to determine whether sugar can dissolve in certain solvents. We observed the dissolving rate of 2g of sugar in 50 mL of water, 50 mL of rubbing alcohol, and 50 mL of vegetable oil. It was hypothesized that if the sugar was put in water, it would dissolve faster than if it was put in rubbing alcohol. It was observed that the sugar dissolved in water, but did not in rubbing alcohol or vegetable oil. Therefore, the hypothesis was correct.
SCIENCE 165-516 Absorption of water by two different paper towels experiment MIRA ALI 201412954 SUBMITTED TO : MRS. VIDHYA SUNIL Introduction: My experiment is about investigating the absorption ability of two types of paper towels in the water, there are many brands of paper towels available , each claiming to be the best , how do we prove or disprove these claims ? Paper towels are very useful when it comes to cleaning , in addition paper towels are used to dry your hands and wipe tables , so we must know which good brand we must use. Paper towels contains small spaces that both liquid and air can pass through.
Breslyn (2016) explained that boiling point is when vapor pressure of a substance such as liquid is equal to the atmospheric pressure. Atmospheric pressure relates to the space of pressure above the liquid, whereas vapor pressure is defined as pressure that is created by the molecules changing from liquid to gas form, when these molecules change to gas they collide with air molecules. Boiling can take place after or
A few months ago, I binge-watched the first season of the television series Arrow. The show is about a billionaire named Oliver Queen, who returns to Starling City after being stranded on an island for five years. By day, Oliver acts like the wealthy businessman his friends and family consider him to be. By night, Oliver secretly is a vigilante who protects the people of Starling city--armed with only a bow and arrow. In episode seven, Oliver meets Helena Bertinelli, a girl Oliver feels he can finally be himself with.
Investigation of the effect of NaCl concentration on the evaporation rate of water. Chemistry HL Internal Assessment Vitaebella Tsang Ao Ling Contents page Contents page 2 Introduction 3 Design 4 Research question 4 Variables 4 Method 5 Results 6 Discussion 9 Evaluation 9 Bibliography 10 Introduction Many recipes call for salt to be added to the water when cooking pasta to add flavor, but there has been common belief or misunderstanding that adding salt will make the water boil faster. However, it is now known that that is not the fact, and that adding salt will do the opposite and make the water boil more slowly instead.
Although different inhalants cause different effects, they generally fall into one of four categories. Volatile solvents are liquids that become a gas at room temperature. They are found
In this experiment, the amount of water lost in the 0.99 gram sample of hydrated salt was 0.35 grams, meaning that 35.4% of the salt’s mass was water. The unknown salt’s percent water is closest to that of Copper (II) Sulfate Pentahydrate, or CuSO4 ⋅ 5H2O. The percent error from the accepted percent water in CuSO4 ⋅ 5H2O is 1.67%, since the calculated value came out to be 0.6 less than the accepted value of 36.0%.This lab may have had some issues or sources of error, including the possibility of insufficient heating, meaning that some water may not have evaporated, that the scale was uncalibrated, or that the evaporating dish was still hot while being measured. This would have resulted in convection currents pushing up on the plate and making it seem lighter by lifting it up
14 vials were used for cotaining samples. When the distillation was proceeding at a moderate speed at about the wanted temperature, the receiver was replaced with a vial as the condensed vapour sample (V) and the thermometer was read. Half of the vial was filled with the sample. The stopper of the distillation flask was removed and using a dropper to collect the liquid.