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Chemistry

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Margaret Ruecker

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Cards in this guide (15)
What are the substances you start with in a chemical reaction called

reactant

How is electroplating done

the metal on which electroplating is to be done is taken as cathode ( negative electrode) . the metal of which electroplating is to be done is taken as anode ( positive electrode) and the salt solution of the metal of which electroplating is to be done is taken as electrolyte .

example-

if we want to electroplate iron with copper then iron is taken as cathode and copper is taken as anode and electrolyte is copper sulphate.Electroplating is the process of plating one metal onto another by hydrolysis, most commonly for decorative purposes. This is done through the use of copper in a copper sulfate bath.

What is molarity pure water

the molarity of water is 55.5.

What does percent composition tell you about a molecule

It tells you how much of a molecule is made up of each element. - APEX

Which of the following would be useful for converting gmol to gL

molarity

Why are state symbols used in chemical equations

They identify what phase the substances are in

-Apex

What does it mean if something is insoluble

It will not dissolve in water.

What are the spectator ions in Mgs Zn2 2NO3- Mg2 2NO3- Zns

NO3-

What is the best definition of a physical change

Answer this question… Which of the following is the best definition of a physical change?

What would be the percent yield of the reaction be if the theoretical yield is 11.22 g but the actual yield was 8.67 g

In this case the yield is 77,27 %.

What does not benefit of using biofuel instead of fossil fuels

Fossil fuel may be used in the production of biofuels.

If the reactants of a reaction are HCI and NaOH what could be a product

NaCl

Is not a concern regarding the use of corn as a biofuel

The color of corn is different than the color of gasoline or coal

APEX

How would 0.000000728 be written in scientific notation

It is 7.28*10^-7 in scientific notation

How many moles of KCI would be dissolved in 4 L of water to make 2 M solution

8 moles

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