Chemistry Lab Final Part 1

Front

What is the definition of immiscible liquids?

Back

Immiscible liquids are liquids that do not mix or form a homogeneous solution when combined.

Front

Which liquid is in the bottom layer when three immiscible liquids are poured in order of increasing density?

Back

The liquid with the highest density will be in the bottom layer.

Front

What is the formula to calculate the concentration of an acid at the equivalence point in a titration?

Back

Use the formula: C1V1 = C2V2, where C is concentration and V is volume.

Front

What is the pH of a solution at the equivalence point of a strong acid and weak base titration?

Back

The pH is typically greater than 7.

Front

How do you determine the equivalence point in a titration?

Back

The equivalence point is determined at the mid-point of the rapid-rise section of the pH curve.

Front

What is the balanced equation for the combustion of magnesium in oxygen?

Back

2 Mg(s) + O2(g) → 2 MgO(s)

Front

What safety procedure should be followed if HCl comes into contact with skin?

Back

Wash the skin for 15 minutes with water and notify the TA.

Front

What is the significance of the equivalence point in a titration?

Back

The equivalence point indicates that the amount of titrant added is stoichiometrically equivalent to the amount of substance in the sample.

Front

What is the role of a titrant in a titration?

Back

A titrant is a solution of known concentration used to determine the concentration of an unknown solution.

Front

What happens to the pH of a solution as it approaches the equivalence point in a strong acid-strong base titration?

Back

The pH rapidly increases as the equivalence point is approached.