I have some questions about the Aerosols lab experiemnt, please answer these que
ID: 889704 • Letter: I
Question
I have some questions about the Aerosols lab experiemnt, please answer these questions significantly and do not copy from google!In the first part of aerosols experiment, LiCl, MgCl2, K2CO3, MA, NaCl, AS, KCl, and K2SO4 were used for the solution. The voltages were measured with 40mL of the each solution. It took a long time to measure since needed to wait until the voltage was stable. There were four points minimum needed and LiCl, MgCl2, MA, NaCl, AS, and KCl were chose for the experiment. Calibration curve graph was plotted with DRH(%) and voltage(V) of the solution. In the second part of aerosols experiment, four solutions of one solute but in different concentrations (%mass) were used. One of the solution was a mixture of two solutes. Raoult’s law was used for this part. For this part, x, mass% and molality are converted and graph is made of them.
(Intro part)
q1: Purpose of the aerosols experiment.
q2: What are aerosols?
q3: Role of aerosols in atmosphere?
(Theory part)
q1: DRH vs RH
q2: RH is concentration dependent (Raoult's Law)
q3: V(hummiter) is linear with RH.
Explanation / Answer
q1- The purpose of this experiment is to generate fine aerosol.
q2-An aerosols is a colloid in which a solid or a liquid is dispersed in a gas( including air) . example - hair spray. fog, mist,smoke, automobile exausts , & cloud.
q-3Aerosols are solid or liquid particles suspended in air having diameter 0.002m to 100 m.
Importance of atmospheric aerosols:-can be listed as
a-heterogeneous chemistry
b-air quality and human health
c-visibility reduction
d-acid deposition
e-cloud formation
f-climate and climate change-
Aerosols interact both directly and indirectly with the Earth's radiation& climate.
The aerosols scatter sunlight directly back into space.Aerosols in the lower atmosphere can modify the size of cloud particles.
Aerosols also can act as sites for chemical reactions to take place e.g. reactions that lead to the destruction of stratospheric ozone layer.
The volcanic aerosol affect the Earth's climate.An aerosol layer is actually formed by sulfur dioxide gas which is converted to droplets of sulfuric acid in the stratosphere over the course of a week to several months after the eruption of volcano.
The desert dust is also aerosol ,the particles in these dust plumes are minute grains of dirt blown from the desert surface also affects the climate.Through absorption of sunlight, the dust particles warm the layer of the atmosphere where they reside. This warmer air is believed to inhibit the formation of storm clouds and thus expand the desert.
The human-made aerosols come in the form of smoke from burning tropical forests, the major component comes in the form of sulfate aerosols created by the burning of coal and oil.
The pollution aerosol also change the climate.