When 8.0 g of propanol (C₃H₇OH) is added to 8.0 g of ethanol (CH₃CH₂OH), which of these compounds would be classified as a solvent?

A certain colloid of nanoparticles in water appears as a colored solution to the naked eye. Which experiment below can be used to determine whether a given mixture is a solution or a colloid?

A chemical spill happened on a lake near a herbicide factory. It was discovered that 15,634 L of Atrazine (C₈H₁₄ClN₅) contaminated the lake through a broken pipeline. Calculate the molarity of Atrazine in the lake if the density of Atrazine is 1.187 g/cm³ and the lake has a diameter of 3.00 km and an average depth of 10.00 m.

Brass is made of copper and zinc of varying proportions and mechanical and electrical properties to develop different types of brass alloys. Gilding metal is typically used for ammunition bullet jackets and this has a composition of 95.0 % copper and 5.00 % zinc. Identify whether Cu or Zn is the solute in gilding metal and calculate the molarity assuming a sample of 50.0 g and density of 8.80 g/cm³.

A concentration of potassium ions below 2.5×10^–3 M in the blood can already be life-threatening. If the blood volume is 5.0 L, calculate the mass of potassium chloride needed to increase the potassium ions from 2.5×10^–3 M to a safe level of 4.5×10^–3 M. Assume there is no change in blood volume.

Calculate the molar concentrations of the ions in a solution formulated using 0.38 g CaSO₄, 2.34 g K₂CO₃, and 1.91 g K₂SO₄, dissolved in water, and diluted to 250.0 mL.

Determine the concentration of SO₄^2- in the following:

A) 0.230 M Na₂SO₄ solution

B) 0.120 M CaSO₄ solution

C) 0.500 M Al₂(SO₄)₃ solution

The concentrated acetic acid in laboratories is found as a 17.4 M aqueous solution. If a student wishes to prepare a 0.225 M solution in 125 mL, how much of the concentrated solution should he use?

In a chemistry lab you prepared a stock solution by dissolving 12.5 g of NaOH (MW= 40.00 g/mol) in water to make 75.0 mL solution. You then took 10 mL of the stock solution and diluted with water to make 125 mL of solution. You then took 35 mL of the diluted solution and added more water to make 250 mL solution. What is the final concentration of the solution you made?

Select the image illustrating aqueous Mg(ClO₄)₂ solution. Note: Water is not illustrated.

Identify whether the given compound is soluble or insoluble in water. Identify the existing ions in the solution when applicable.

i) CuBr

ii) BaS

iii) Na₃PO₄

iv) CaCO₃

Suppose that the electrical conductivity of a solution is directly proportional to the total ions dissolved and using titration procedures the conductivity of three different solutions were measured:

(i) A 0.150 M NaOH is added dropwise in a 1.00 L of 0.150 M HCN solution.

(ii) A 0.150 M CaCl₂ is added dropwise in a 1.00 L of 0.150 M Na₃PO₄ solution.

(iii) A 0.150 M NaBr is added dropwise in a 1.00 L of 0.150 M Pb(NO₃)₂ solution.

Match the following graphs to the correct titration. 

The pictures show three different substances, A₂X, B₂X, and C₂X, dissolved in water at the molecular level. (Water molecules have been left out for simplicity.) Which substance is the weakest electrolyte?