Lab 5 Flashcards


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1

One atmosphere is ~equal to

760 mm Hg

2

When determining R at the conclusion of this experiment, pressure must be in _____ and temperature in ____

atmospheres, kelvin

3

The purpose of adjusting the water level in the Florence flask to equal the level of the liquid in the buret is

to make the pressure inside the buret equal to atmospheric pressure

4

Dalton's Law of Partial Pressures states that

the total pressure exerted by a mixture of gases is equal to the sum of the pressures exerted by the individual components in the mixture

5

The accepted value for the Ideal Gas Constant is

0.08205 L.atm/mol.K

6

The pressure of hydrogen gas contained in the buret is approximated by

Atmospheric pressure minus the vapor pressure of water at this temperature

7

The gas that is produced in this reaction is

hydrogen

8

At the conclusion of the reaction hydrogen is the only gas contained in the buret

false, the gases contained are hydrogen, gaseous water and air

9

In this experiment the pressure exerted by which of the gases contained in the buret cannot be measured or determined

air

10

The mass of aluminum chosen for this is experiment is determined by

the capacity of the buret

11

What is the approximate mass of aluminum used in this experiment

0.025g

12

When the chemical equation
Al(s) + NaOH(aq) + H2O(l) = NaAl(OH)4(aq) + H2(g)
is balanced, the stoichiometric coefficient in front of the water is

6

13

The barometer is located

there isn't one in the laboratory but our TA will give us the value

14

While doing the experiment the buret is

inverted

15

Two gas laws are made use of in this experiment. They are

Ideal Gas and Daltons

16

The reagents used in this experiment are

aluminum, sodium hydroxide and water

17

The ~molarity of the sodium hydroxide used in this experiment is

1

18

The purpose of this experiment is to

determine ideal gas content

19

To convert temperature to Kelvin

oC + 273.15