Liquid

which is one minute, and the amount of liquid in each can which is 10 mL. We also had confounding variables which are variables that the researcher failed to control, or eliminate, damaging the internal validity of an experiment. Some confounding variables in our experiment are the temperature in the can when we flip it because we actually couldn’t tell what it was, and the fact that we couldn’t control the fact that there should be exactly 10 mL of the liquid in the can because no matter what…

the temperature at which a solid becomes a liquid (Bruice 2014). On the molecular level, when a compound melts the forces between the molecules become weaker. This is because when a substances heats up the kinetic energy between the molecules increase causing the molecules to vibrate. When the vibrations become strong enough for the molecules to move around and pass other molecules, the compound that is being heated up starts to melt and become a liquid. In this lab, five different ratios of…

INTRODUCTION Chemically and thermodynamically foam is an unstable, dispersed system of entrapment of gaseous molecules in solid or liquid matter. Instability of foam is caused generally due to coalescence, liquid drainage and disproportion of bubbles. Foam being aqueous system can be produced using surfactants available commercially. The types of surfactants used in preparation of aqueous foam influence the foam properties (Eisner et al., 2007; Bhakta and Ruckenstein, 1995). Successful foam…

Emulsions are mixtures that contain two or more substances that cannot combine to make homogenous mixtures. One of the liquids contains dispersions of the other substances. The emulsions are formed from shaking the substances vigorously to counteract the different densities of the substances. The extra substances added to the emulsions beside water and oil are refered to as emulsifiers. The emulsifiers are substances added to keep the oil from separating completely from the water. Emulsions are…

are destroyed. ____ 14. The melting point of water is 0°C. Its boiling point is 100°C. The thermometers show the temperature of four samples of water. Which statement is true? A Only sample B is solid. B All four samples are liquid. C Only samples A and C are liquid. D None of these ____ 15. Hailey is investigating changes in the states of matter. Wearing safety gloves and goggles, she is heating a pan of water on a hot plate. She observes water vapor beginning to rise from the surface of…

¨All Mixed Up!¨ Purpose: To separate out four components of a mixture using their unique properties in order to better understand matter: substances vs mixtures and their definitions as well as to better understand phase changes as well as physical vs chemical change. Materials: -Beakers -Graduated cylinder -metal screen -tongs -ring stand -bunsen burner -ring -wire gauze -hot plate -crucible -clay triangle -balance -magnet -stirring rod -plastic bag -paper towels…

he process of injecting liquid at high pressure into subterranean rocks, boreholes, and more is called Fracking. Many people say fracking causes earthquakes because fracking occurs underground. Fracking could be dangerous in some ways. Modern fracking began in the nineties. A hydraulic fracturing and combined with horizontal drilling. Fracking is the reason why America is having an energy revolution right now. Fracking is letting the U.S. tap vast oil and natural gas reserves that…

percent yield are losing crystals during the transfer to the bigger filter paper or if the reaction did not fully proceed to the end. A lower melting point shows an impurity of the final product collected and this could have been due to any water or liquid still left in the crystals; one…

The meniscus, also stated before, gave the students a measuring problem in the beginning, when filling up the graduated cylinder to 100 mL. In Lab Debrief Part One, we discussed this situation and later found out that the meniscus was a curve of the liquid and could be either convex or concave. An observation in the experiment was when the pennies were displacing both water and milk, which created convex meniscus; this was the effect of surface tension. Surface tension was a large aspect of our…

One of the most unusual substances in chemistry, slime blurs the line between solid and liquid stages of matter. Slime and other substances like it are common in the average everyday life today, and yet are almost unnoticed. Slime is a colloid, a substance that shares both liquid and solid traits. Many colloids are polymers, which are a certain type of molecule. Although slime may seem simple, in reality it is quite complex in the microscopic standpoint. Slime can also be referred to as a…