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Chemistry

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Josefina Kunze

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Cards in this guide (11)
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 the equation of methane with bromine in the presence of sunlight

CH4(g) + Br2(g) -----------------> CH3Br(g) + HBr(g)

(sunlight/UV Light)

What does percent composition tell you about a molecule

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

What is the percent composition of sulfur in SO2

32.1g

__________________

X100%

(32.1g + 16.0g + 16.0g)

What does it mean if something is insoluble

It will not dissolve in water.

What is the molecular formula of the compound CH2 with molar mass 168

C12h24

What would be useful for converting g mol to g L

Molarity

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 %.

Identify the reactants in the reaction HCl plus NaOH NaCl plus H2O

The reactants are HCl and NaOH.

If the products of a reaction are CO2 and 2H2o what is known about the reactants

They do not include any C, O, or H atoms.

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