Chemistry Quiz

Sodium carbonate and sulphuric acid is reacted, what are the expected products?

• Na₂SO₄ + H₂O

• Na₂SO₄ + CO₂ + H₂O

• 2 NaSO₄ + H₂O

• Na₂CO₃ + SO₄ + H₂O

How many L of 4.00 M HCl are needed to prepare 1250 mL of 0.250 M HCl solution?

Write the answer to three significant figures?

• 0.0781 L

• 0.0315 ml

• 78.1 ml

• 0.0315 L

When 12 grams of methane gas reacts with 9 grams of chlorine gas, 3.12 g of Carbon tetrachloride is produced. What is the percentage yield of success? $CH_4(g)+4Cl_2(g)\ \rightarrow\ CCl_4(g)+4HCl(g)$  

Consider this reaction and choose the appropriate title below:

• Dilution of liquid

• An increase in the concentration of liquid

• An acid-base reaction

• A neutralisation reaction

Describe the event occurring in this image in five sentences.

A 30.00 mL sample of sodium hydroxide, is titrated with 0. 68 M HCl solution. The volume of HCl solution required is 32.88 mL. What is the molarity of the NaOH solution?

• 0.341 M

• 0.745 M

• 74.5 M

• 34.1 M

What is the name of the reaction occurring in this image?

• Evaporation

• Neutralization

• Precipitation

• Fusion

 $GaCl_3$  

Write the systematic name of the compound above:

If 4.02 g of potassium hydroxide solution is reacted with 7.89 g of sulphuric acid, what is the theoretical yield of the salt, potassium sulphate, in grams?

• 6.24 g

• 3.13 g

• 64.3 g

• 3.13 g

Consider the hydrogen gas. At 0.685 atm, a 1.50 L volume of hydrogen measured at –85 °C is warmed to 90 °C, at 1.2 atm. Is the gas expanding? If so, how?