subject
Chemistry, 16.10.2019 16:30 kerstynsharp08

True or false? 1. always use small containers that you can control easily to carry or transfer chemicals in the laboratory, use the smallest container that will do the job. 2. it's important to read the instructions all the way through before beginning an experiment. when mixing strong acids and water, the water should always be added to the strong acid. η η εε when attempting to smell a chemical, it's best to hold it away from your face and waft the vapors to your nose. you should work with harmful, volatile chemicals in a fume hood. — 6. in order to avoid contamination, never put leftover chemicals back into a reagent bottle; the excess should be shared with a classmate or deposited into the chemical waste container. broken glass and contaminated paper towels should be discarded in the regular trash container. 8. to be sure that your hands are free from chemicals, you should always wash them before you leave the laboratory. 9. you should use a bunsen burner to heat volatile, organic liquids that give off flammable vapors. 10. if the bunsen burner has a yellow, smoky flame, increase air flow by opening the air vent. this will increase the amount of oxygen available for combustion and result in a hotter flame. 11. it's safe to heat glassware that has cracks or stars. 12. you should never "shake down" a laboratory thermometer. 13. tie up loose, long hair in the laboratory, especially when working near an open flame. 14. chemical splash goggles must always be worn when working in the laboratory, even during cleanup. 15. when working in the laboratory, it's important to store coats, backpacks, and purses in a designated, safe location; keep aisles and bench tops clear of personal belongings. _ 16. when you're hungry, it's acceptable to eat and/or drink in the laboratory. 17. if you get chemicals in your eyes, you should rinse them thoroughly at the eyewash station for no more than five minutes. 18. you should immediately report injuries, fires, chemical spills, and broken thermometers to your instructor

ansver
Answers: 3

Other questions on the subject: Chemistry

image
Chemistry, 21.06.2019 23:00, jamccoy3335
Will mark brainliest26. which of these statements are true? (3 points)a. gases are compressibleb. gases fill their containers completelyc. the pressure of a gas is independent of the temperatured. gases have masse. gases exert pressuref. the pressure of a gas is dependent on the volumeg. gas pressure results from the collisions between gas particlesh. gases have a definite volume and shape
Answers: 1
image
Chemistry, 22.06.2019 14:30, Cartucho1978
According to le chatelier’s principle, a system in chemical equilibrium responds to stress by shifting the equilibrium in a direction that reduces the stress. normalizes the stress. increases the stress. changes the stress.
Answers: 1
image
Chemistry, 22.06.2019 16:50, TrueKing184
Answer asap need by wednesday morning explain how a buffer works, using an ethanoic acid/sodium ethanoate system including how the system resists changes in ph upon addition of a small amount of base and upon addition of a small amount of acid respectively. include the following calculations in your i. calculate the ph of a solution made by mixing 25cm3 0.1m ch3cooh and 40cm3 0.1m ch3coo-na+. [ka = 1.74 x 10-5 m] ii. calculate the ph following the addition of a 10cm3 portion of 0.08 m naoh to 500cm3 of this buffer solution. iii. calculate the ph following the addition of a 10cm3 portion of 0.08 m hcl to 200cm3 of the original buffer solution.
Answers: 1
image
Chemistry, 22.06.2019 18:30, rianna14
Which of the following nuclei would be the least stable a 2 protons, 2 neutrons b 1 proton 1 neutron c 1 proton 3 neutrons d 1 proton 2 neutrons
Answers: 3
You know the right answer?
True or false? 1. always use small containers that you can control easily to carry or transfer chem...

Questions in other subjects:

Konu
Mathematics, 06.05.2020 01:32
Konu
Mathematics, 06.05.2020 01:32
Konu
Spanish, 06.05.2020 01:32