6- Place only the edge of the Q-tip at the top the Flame. 7- Remove it when you see the of light being given off to avoid burning the Q-tip. 8- Clean up procedure: Discard used Q-tips to the bin, cover back compounds and put them up in a safe place, pour away distilled water in the sink, disconnect the Bunsen burner and clean it if stained,clean the lab test surroundings with paper towel to ensure no stain is left, wash your hands remove your goggles only when all equipments have been placed in safe places. Compound | Flame Colour Observation | 1 LiNO3
Ideally this should be done as soon as possible after feeding the baby to prevent any bacteria from multiplying. Extra care should be taken when washing teats to make sure any stubborn milk curds come off as these can survive the sterilising process. Also to clean the teats fully turn them inside out to wash. There are three types of sterilising: Steam Sterilising Cold water chemical sterilising Boiling 1: Steam sterilising. Steam sterilisers are quick and efficient, taking roughly 8-12 min plus cooling time and require no chemicals or rinsing.
How to wash your hands Washing your hands properly is an easy way to avoid getting and spreading viruses and germs. First, remove all rings, watches, bracelets, or other jewelry on hands and wrists. Jewelry can carry pathogens and should be cleaned with a disinfectant separately, so they will not be damaged. Next, stand close enough to the sink to reach the flow of water without touching the sink with your body because the sink itself should be considered contaminated. By standing too close to the sink it may spread any contamination to your cloths.
Add the HCl SLOWLY to the magnesium by running it down the side of the beaker. Adding the acid too quickly will result in the spattering of the acid. Write down any observations of the reaction. 6. After all the acid has been completely added and the reaction has stopped, use a pipette to add a few extra drops of acid into the beaker until the reaction stops.
b) Open the cover of the petri dish halfway and pour in the agar to just cover the bottom of the dish. Try to minimize the introduction of bubbles. c) Repeat for all the dishes. d) Immediately rinse the flask with warm water to facilitate washing the flask. 5.
The watch glass was removed with the beaker tongs. Using a rubber bulb and a stirring rod to stir the solution continuously, 15.00mL of .25M BaCl2 solution was added to the solution in the beaker. The watch glass is replaced and the solution is keep hot but not boiling for 15 minutes. The precipitate was allowed to settle. When the liquid above the precipitate was clear, the solution was tested for completeness of precipitation when a few drops of BaCl2 solution were added from a pipette.
To get accurate result, this titration process are repeated for another two times. The entire procedure by which we obtain the molarity of a solution of one substance (NaOH) from an accurately known amount of another substance (KHP) is called standardization. The average molarity of the sodium hydroxide solution will be used in the next experiment. The second experiment is conducted to determine the molarity of acetic acid and mass percent in vinegar. 100mL of distilled water was added to 10mL of vinegar and followed by 1mL of NaOH was pour into the solution.
Once it is completely distilled, remove your filtered material and add 2 mL of dichloromethane. Swish the flask, and then place into a small beaker. Next, place the beaker with the distilled liquid on a heating mantle and heat to a gel like substance. Make sure not to burn it. The next processes that will be
STERILISING: Wash your hands thoroughly with soap and water. Clean your surfaces with hot soapy water. Get your feeding equipment (they should be washed in hot soapy water with a bottle and teat brush as soon as possible after a feed, and then rinsed with clean cold water). DID YOU KNOW? Dishwashers will clean bottles, but not sterilize them as the water will not get hot enough.
Record the starting time, which is the time all the water was poured in 9. After 15 minutes, record the stopping time 10. Measure the volume of the collected purified water and record this in the data table 11. Record observations of purified water 12. Take purified water to water testing station and record the data 13.