Molar concentration

The molar concentrations of copper (II) sulfate solutions A, B, and C were 0.46 M, 1.00 M, and 0.20 M. These values were obtained by creating a calibration curve using the molar concentrations and photoresistor voltage drops for solutions 1 through 5. The quadratic equation of the calibration curve was used in conjunction with the photoresistor voltages for solutions A, B and C to predict the molar concentrations of solutions A, B, and C. The calibration curve and colorimeter valid means of estimating

as the -log[H1+ ]. In 1924 Sorensen realized that the pH of a solution is a function of the "activity" of the H1+ ion not the concentration and published a second paper on the subject. A better definition would be pH=-log[aH1+ ], where aH1+ denotes the activity of the H1+ ion. The activity of an ion is a function of many variables of which concentration is one. It is unfortunate that chemistry texts use a definition for pH that has been obsolete for over 50 years. Because of the difficulty

The purpose of the lab is to determine the molar concentration of acidic acid in vinegar by titrating it with a solution of NaOH. The sodium hydroxide is a basic solution. When adding it to a acetic acid, a neutralization occurs. An indicator is added to the solution. The indicator is a dark pink color. When the NaOH is added, it makes the solution more basic and causes the solution to turn light pink. The experiment is successfully completed when the right amount of indicator is added, and It turns

Isotopic analysis is one of many methods used by archaeologists to look at how past cultures and societies lived and were organized. The stable strontium isotope is one of these, and is primarily (with other isotopes) to look at diet and mobility. The measured value in strontium isotopic analysis is the ratio of the natural abundancy of two of strontium’s’ isotopes; naturally occurring 86Sr and radiogenic 87Sr that is derived from the decay of rubidium-87 (Bentley 2006; Hodell et al. 2004; Price

light absorption of a substance is, and whit this data combining the Beer’s law equation you can determine the concentration of different things in a solution, in this case using a orange Gatorade looking the concentration of its dye which is yellow dye #6 and what amount of this Gatorade sample is needed to kill someone. The outcomes in this experiment were that the yellow dye #6 concentration is

Measure the conductivity of the reaction between sulfuric acid and barium hydroxide * use conductivity values to determine equivalence point * measure mass of a product to determine equivalence point gravimetrically * calculate molar concentration of barium hydroxide solution Procedure: * First, combine 10.0 mL of the Ba(OH)2 solution with 50 mL of distilled water. Then, measure out 60 mL of 0.100 M H2SO4. Set up a conductivity probe and open programs by connecting to logger pro

Christina Cox Your Life as a Microbe project September 1, 2016: My name is strep. Streptococcus Mutans to be exact. I live in a diverse community but my family make up about twenty percent of the world we live in. Our home is called mouth. We have lived here for as long as I can remember. From what I have been told we lived here before there were even homes for us. As a baby our host was kissed by a caregiver who transferred my family to our host. I wasn’t around yet but I hear we had to live down

This prospective clinical study was conducted in Department of Oral and Maxillofacial Surgery, Ragas Dental College and Hospital, Chennai, from April 2014 to October 2016. 40 healthy patients requiring surgical extraction of impacted mandibular third molars and fulfilling inclusion criteria were included in the study out of which 23 were males and 17 were females. The nature and number of the diagnostic investigations required, the clinical procedure about to be performed, the duration of the treatment

Mg2+ Determination using EDTA Linh Nguyen Chem 1212L – 165 Feb 08 , 2014 Purpose and Procedure: The purpose of this experiment is using Compleximetric titration and EDTA to determine the concentration of Mg2+ in solution; and also calculating the percent by mass of MgO in the unknown sample. This procedure results no significant deviations. The procedure for the experiment is from the lab manual referenced below Laboratory Experiments for Chem 1211L & 1212L (6e)

maximum absorption was found for both solutions and was used to calculate the molar extinction coefficient of methylene blue. An unknown concentration of methylene blue was calculated by using