National Chemistry Week on October, 2018: Quick and easy basic chemistry experiments?

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National Chemistry Week 2018.

Quick and easy basic chemistry experiments?

Make pH indicator with purple cabbage and have students test different sodas, cleaning compounds, juices, water, etc.

Place a whole uncracked egg in vinegar and have students observe over a week or so. Control=water

Separate an egg white and yolk and place each into vinegar. Reaction takes place within 1 hr and is very cool. If you have some NaOH, do the same thing, and of course use a control beaker with water.

Place a nail in soda (Coke works well) and have students observe over time.

Add oil to water; mix in detergent to show emulsification

See

and check some of the websites for the national chemistry assns.

Have fun!

Amazon Gold Box

SAT II Chemistry?

SAT II Chemistry?

I never took the SATII Chemistry, but I did take Biology. (I just finished High School in Malaysia and taking the national exam in a week.)

I think it's safe to say that having completed CP Chemistry, you should be very qualified to take the SATII's. It should be no harder than high school level.

If chemistry is your thing, then you should definitely take it. Also, go to www.sparksnotes.com. They have excellent reference there and also some free practice tests.

what r the uses and misuses of chemistry in daily life.?

what r the uses and misuses of chemistry in daily life.?

Chemistry (from Greek χημεία khemeia[1] meaning "alchemy") is the science of matter at the atomic to molecular scale, dealing primarily with collections of atoms, such as molecules, crystals, and metals. Chemistry deals with the composition and statistical properties of such structures, as well as their transformations and interactions to become materials encountered in everyday life. Chemistry also deals with understanding the properties and interactions of individual atoms with the purpose of applying that knowledge at the macroscopic level. According to modern chemistry, the physical properties of materials are generally determined by their structure at the atomic scale which is determined by the properties and energies of the interactions.

uses

Cosmetics

Cosmetics - learn about the chemistry in curling and dying your hair

Chemistry of Cosmetics - learn about lipstick, perfume and beauty products for the skin and hair

Science Net - use this site to look for the chemistry in some everyday activities

National Chemistry Week - read this article to learn more about chemistry in cosmetics

Food

Jello - learn the chemistry of this dessert

Kitchen Chemistry - shows how everyday cooks uses chemical reactions in cooking

Food Chemistry - learn the many kitchen recipes that use chemistry

Fabric

Chemistry Saves the Clothes - this site will show the chemistry in stain removal

Cleaning

Soaps and Chemistry

Other Uses of Chemistry in Everyday Life

Chemistry of Air Bags - this site will amaze you

Photography - learn the chemical reactions involved in a picture

Chemistry of Photography

Light sticks - get the chemistry behind the glow-in-the-dark

ROC curves have become the standard for describing and comparing the accuracy of diagnostic tests. Not surprisingly, ROC curves are used often by clinical chemists. Our aims were to observe how the accuracy of clinical laboratory diagnostic tests is assessed, compared, and reported in the literature; to identify common problems with the use of ROC curves; and to offer some possible solutions. METHODS: We reviewed every original work using ROC curves and published in Clinical Chemistry in 2001 or 2002. For each article we recorded phase of the research, prospective or retrospective design, sample size, presence/absence of confidence intervals (CIs), nature of the statistical analysis, and major analysis problems. RESULTS: Of 58 articles, 31% were phase I (exploratory), 50% were phase II (challenge), and 19% were phase III (advanced) studies. The studies increased in sample size from phase I to III and showed a progression in the use of prospective designs. Most phase I studies were powered to assess diagnostic tests with ROC areas >/=0.70. Thirty-eight percent of studies failed to include CIs for diagnostic test accuracy or the CIs were constructed inappropriately. Thirty-three percent of studies provided insufficient analysis for comparing diagnostic tests. Other problems included dichotomization of the gold standard scale and inappropriate analysis of the equivalence of two diagnostic tests. CONCLUSION: We identify available software and make some suggestions for sample size determination, testing for equivalence in diagnostic accuracy, and alternatives to a dichotomous classification of a continuous-scale gold standard. More methodologic research is needed in areas specific to clinical chemistry.

Also on this date Monday, October 1, 2018...