1 / 8

WATER TESTING LAB

WATER TESTING LAB. Pre lab. Reference solution – a solution of know composition used as a comparison –[one know to contain the sought ion Control- controls are groups where no phenomenon is expected. PRE LAB.

mitch
Download Presentation

WATER TESTING LAB

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. WATER TESTING LAB

  2. Pre lab • Reference solution – a solution of know composition used as a comparison –[one know to contain the sought ion • Control- controls are groups where no phenomenon is expected

  3. PRE LAB • Confirming test – positive test confirms the presence of the ion[due to change in color or formation of precipitate ] • Precipitate – change in color of appearance of sample due to formation of an insoluble substance • negative test –no change in appearance [no color or precipitate] means ion is not present or present in very low amounts

  4. Materials • Micro plate , pipettes, tooth picks , distilled water, tap water , dead sea water, reference solutions • Testing solutions –KSCN,AgNO3, Barium chloride

  5. precaution • Follow all lab safety rules • Protect eyes and skin wear goggles and aprons • Do not taste or smell any chemicals , do not touch chemicals with bear hands • If any chemical falls on your skin wash with cold water tell the teacher • Some chemicals are toxic and others stain skin handle with care • Wash hands at the end of the lab

  6. Precaution • Label a white sheet of paper as show in the data table • Label pipettes with a permanent marker • Do the touch the pipette with samples when dispensing liquids • Do not touch the tip of the pipettes • Stir each well with a separate tooth pick • Clean up – toothpicks in garbage , wash plate as instructed , pipettes in garbage

More Related