1. How does Sunblock work? Sunscreen contains organic and and inorganic chemicals. The sun shines down UV Rays which are harmful to our skin. The organic chemicals in sunscreen absorb the UV Rays through their chemical bonds. As the bonds absorb UV radiation‚ the parts of the sunscreen slowly break down and release heat. The higher SPF a sunscreen is‚ the more it protects against the UV Rays the sun shines down. 2. How does detergent work? Detergents are made up of things called surfactants
Premium Vitamin D Chemistry Sunscreen
interactions may occur with coadministration of a quinolone with an aluminum- or magnesium-containing antacid‚ theophylline‚ or caffeine. When coadministered with an aluminum- or magnesium containing antacid‚ oral bioavailability of norfloxacin (553)‚ ciprofloxacin (231‚ 290‚ 350‚ 598)‚ ofloxacin (352‚ 475)‚ and perhaps all quinolones is substantially diminished‚ possibly by binding of quinolone to antacid. Peak serum concentrations decreased 16-fold for ciprofloxacin and 4-fold for ofloxacin (352). Sucralfate
Premium Urinary tract infection Paracetamol Pharmacokinetics
water ( not reversible ) - ex: water donates proton to ammonia – reversible - Amphoteric substances: ____________________________________________________________ - Advantage of B-L definition: - 1. reactions can be identified as acid-base neutralization reactions without water - 2. salts that form acidic or basic solutions when dissolved can be explained Reversible Acid – Base Reactions - many B-L acid-base reactions are reversible - Conjugate acid – base pair – differ only by one H -
Premium Acid PH Acid dissociation constant
Lab 12: Titration of Acetic Acid in Vinegar Abstract: To lesarn how to titrate chemicals in a lab. Also to be able to determine the concentration of an acetic acid solution. Purpose: To learn how to titrate‚ and calulate the concentration of an acetiuc acid solution. In this case the concentration of vinegar‚ which is diluted acetic acid. Hypothesis: The sodium hydroxide used in this titration would balance out the acetic acid in vinegar. The phenolpthalein‚ a acid –base color indicator
Premium Acetic acid Sodium hydroxide Acid
Question #1 Antacid Volume NaOH used in back-titration (mL) Volume NaOH used in back-titration (L) Moles NaOH used in back-titration Maalox 24.1 mL 1.205 .001205 Tums 22.4 mL 1.00 .00112 Mylanta 20.0 mL 0.995 .001 CVS 19.9 mL 1.220 .0009995 Rennies 24.4 mL 1.120 .00122 Based on the values you calculated above‚ which antacid is the strongest / weakest on a single-dose basis? Please explain. Question #2 Antacid Moles base in
Premium Acid Hydrochloric acid
©2014‚CarolinaBiologicalSupplyCompany 3 MEASUREMENT AND UNCERTAINTY General Lab Questions 1. Consider an experiment to determine the average rate of reaction of an antacid in water. Students drop the antacid in the water and use a stopwatch to measure the time for the antacid to stop bubbling in the water. One student drops the antacid and another student watches and carefully starts the watch a. Identify two possible sources of systematic error: Students‚ coordination and reading between the two
Premium Statistics Normal distribution Standard deviation
Analysis of Soda Ash and Volumetric Analysis of a Carbonate-Bicarbonate Mixture Belardo‚ Pia Jobelle J. Department of Chemical Engineering‚ Faculty of Engineering University of Santo Tomas España‚ Manila February 27‚ 2013 Abstract The analyte used is the soda ash which is titrated with an HCl titrant‚ standardized by Na2CO3. The indicators used are phenolphthalein for basicity and methyl orange for acidity. The two volumes of the titrant are then used to calculate percent composition of
Premium Titration Sodium hydroxide Hydrochloric acid
often due to the finding of blood in his stools. At every visit‚ John never sees a physician‚ only a physician’s assistant. Robert‚ the physician’s assistant‚ never orders any testing on John‚ only sends him home with the advice to take an antacid. While the antacid is suggested to control the bleeding‚ John fails to let Robert know that he has been taking aspirin more often recently due to persistent headaches. John is sent home only to be rushed to the emergency room two days later and is diagnosed
Premium Physician Medicine Patient
The three most important idioms’ that are needed in a zombie apocalypse are knifes or multi-tool‚ antacid‚ map of your area and compass. All these idioms’ are useful for the Rot and Ruin for Benny‚ Tom and their friends. On the first night in the book Rot and Ruin‚ a knife could have been used in many ways for the living to defend themselves. For instance‚ when Rob ran into the cabin with a few other men for safety. In addition‚ the knife should have been used when the men tried to find help and
Premium Night of the Living Dead The Zombies Zombie
Aim: To calculate the enthalpy change of neutralization of the given pairs of acid and base. Theory: When alkali neutralizes an acid‚ a salt and water are formed. Aqueous hydrogen ions‚ H+(aq) from the acid react with the hydroxide ions‚ OH-(aq) from the alkali‚ forming water. Ionic equation: H+ (aq)+OH- (aq) → H2O (l) The identity of the salt will depend on the nature of the acid and alkali used. The combination of H+ and OH- ions in this way releases energy. In this practical‚ the enthalpy
Premium Sodium hydroxide Thermodynamics