A mixture (also called a solution) with a completely uniform composition throughout, where the components are evenly distributed at the molecular level and cannot be distinguished even under a microscope.
It looks the same everywhere. You can't see the separate parts, even under a microscope.
Showing a random 20 of 50 problems.
Example 1
medium
Seawater and a sugar solution are both clear. Explain why both are classified as homogeneous mixtures.
Example 2
medium
True or false: components of a homogeneous mixture can be separated by physical means.
Example 3
medium
A solution contains 15g of sugar in 135g of water. Find the mass percent of sugar.
Example 4
medium
Brass is 70% Cu and 30% Zn by mass. What mass of Cu is in a 250g brass coin?
Example 5
medium
Distinguish: solute, solvent, and solution. Which is the homogeneous mixture?
Example 6
medium
Is window glass (silicate plus other oxides) a homogeneous mixture?
Example 7
medium
Is sea water before any solids settle a homogeneous mixture?
Example 8
easy
Is salt water (fully dissolved) a homogeneous mixture?Particles of Na⁺ and Cl⁻ (two species) uniformly mixed in liquid water — a homogeneous mixture
Example 9
easy
Is solid sterling silver (92.5% Ag, 7.5% Cu) a homogeneous mixture?
Example 10
challenge
A metallurgist needs a material with a precisely tunable melting point. Explain why a homogeneous mixture (alloy) suits this better than a pure metal.
Example 11
medium
Is air a homogeneous mixture or a pure substance? Justify your answer and list its major components with approximate percentages.
Example 12
challenge
Two clear, colorless liquids look identical: one is pure water, one is dilute salt water. Describe two tests that distinguish the pure substance from the homogeneous mixture.
Example 13
easy
Define a homogeneous mixture and explain how it differs from a heterogeneous mixture. Give two examples of each.
Example 14
easy
Is filtered tap water (clear, uniform) a homogeneous mixture?
Example 15
easy
Is gasoline (a mix of hydrocarbons) a homogeneous mixture?
Example 16
medium
Stainless steel looks like a single shiny metal. Classify it and justify with the uniformity criterion.
Example 17
hard
A 500mL saline solution has a NaCl concentration of 0.90g/100mL. How much NaCl is dissolved?
Example 18
medium
Why is air, even though it contains N2, O2, Ar, and CO2, called a homogeneous mixture?
Example 19
medium
Is salt water a homogeneous mixture or a pure substance? Give the deciding reason.
Example 20
easy
Is vinegar (acetic acid dissolved in water) a homogeneous mixture?