Hands-on labs (hol) is the world leader in distance learning hol is changing the way education is conceived, delivered and consumed around the world, regardless of location, time zone, or device. Each labpaq comes complete with a full color lab manual on cd and contains all required science equipment, chemicals, and supplies such as beakers, test tubes, well-plates, a 500 gram. Form dl-300 - mvamarylandgov open document search by title preview with google docs motor vehicle administration 6601 ritchie highway, ne glen burnie, maryland 21062 for more information, please call: 410-768-7000 (to speak with a customer agent. Determination of water hardness using a titrator hands-on labs, inc version 42-0152-00-02 lab report assistant this document is not meant to be a substitute for a formal laboratory report. Water hardness is also commonly expressed in units of grains/gallons, where 1 grain/gallon equals 171 ppm caco3 express the hardness of this slightly hard water sample in grains/gallon 58 ppm/ 171 ppm = 339 gpg.
Hardness of water by edta titration introduction water hardness is caused by natural minerals that are dissolved into the water, predominantly calcium and magnesium, and is measured as the equivalent concentration of calcium carbonate (in milligrams per litre. The amount of water (and therefore the amount of calcium and magnesium ions) needed to set off the indicator will be used to calculate the hardness of the water experiment/observations: there are three parts involved in this experiment. 1 chelometric titration : the determination of water hardness and water filtration things for the lab notebook and to be included in the lab report: essentials of biology lab manual.
Created date: 9/11/2003 2:13:11 pm. Hardness in water can cause water to form scales and a resistance to soap it can also be defined as water that doesn't produce lather with soap solutions, but produces white precipitate (scum) (wikipedia, 2009. Open document below is an essay on determination of water hardness using a titrator from anti essays, your source for research papers, essays, and term paper examples. Determination of water hardness using a titrator peter jeschofnig, phd version 09104 read the entire experiment and organize time, materials, and work space before beginning remember to review the safety sections and wear goggles when working with chemicals.
If you need the corresponding lecture general chemistry ii is designed for the student to take the lecture and lab concurrently in order to earn four credits. Lp-0123-ck-02: labpaq, chemistry, 11 labs | ebay email to friends share on facebook - opens in a new window or tab share on twitter - opens in a new window or tab share on pinterest - opens in a new window or tab. This is an a graded lab this is for biology 1 labpaq by suzanne9wiggins9will in types school work and labpaq biology. Hardness is a property of water that is not a health concern, but it can be a nuisance hard water can cause mineral buildup in plumbing, fixtures, and water heaters, and poor performance of soaps and detergents.
The hardness of a sample of water can be measured by determining the concentration of the dissolved ca2+ and mg 2+ ions the procedure you will use is called a titration (see your text, pp 153-155, for descriptions of. Determination of water hardness labpaq pdf results chemistry labpaqs have been in continuous use since open document search by title preview with google docs.
The hardness of a water sample was successfully discovered by finding the calcium content in the sample the calcium content from the three trials performed were 2103 ppm, 2003 ppm, and 2007 ppm the average of these three trials with standard deviation was 2038 ± 566 ppm. An experimental procedure in penn state's version of chemtrek august 2000-july 2001 on pages 10-12 to 10-20, which was written by stephen thompson, is a good procedure to determine the hardness of water. Knowing this can then allow the hardness of water to be found, which was 5895 ppm ca the fact that tap water generally has 100-150 ppm ca shows that the hardness of water.
For an exact listing of materials, refer to the contents list included in your labpaq kit 3 ©hands-on labs, inc experiment determination of water hardness using a titrator this preview has intentionally blurred sections. Purpose: to become familiar with the concept of water hardness, practice a titration technique using a titrator, and determine the hardness of the local water supply procedure: 1 gather the test tube holder, small stopcock, 10-ml syringe (titrator), and 2 thick textbooks and the labpaq box or 5-6 thick textbooks 2. The labpaq referenced in this manual is produced by hands-on labs, inc which holds and reserves all copyrights on experiences the laboratory manual included with a labpaq is intended for the sole use.
3 water supply is and whether it may need conditioning to reduce the hardness it is not necessary to measure each ion contributing to the water hardness separately. The total hardness of water is measured from the amount of calcium and magnesium present in the water sample in this experiment, the total hardness was measured using the complexometric edta titration ethylenediaminetetraacetic acid, or edta, is widely used in titrations of metal cations it is a.