A saturated solution is one in which: (1 mark) A. No more solute can dissolve at a given temperature. B. More solute can always be added. C. The solute and solvent separate completely. D. The solute is removed by filtration.
No more solute can dissolve at a given temperature.
true or false and fix the false : You cannot change the amounts of substances in a mixture.
false,you can change
When salt dissolves in water, a ------- forms.
solution
Which of the following statements is false? (1 mark) A. A pure substance has a fixed melting point. B. Solubility of a substance can change with temperature. C. A saturated solution can dissolve more solute.
A saturated solution can dissolve more solute.
m heats a sample. He plots the temperature every minute. Use the graphs to decide whether the sample is a pure substance or a mixture of substances. Explain your decision. (2 marks)
its temperature stays the same until all the solid has melted,This shows that the sample is pure
Explain why Seawater is considered a mixture.
it contains multiple substances that are not chemically bonded together. It is composed of water (H₂O), dissolved salts (such as sodium chloride), gases (like
The formula of carbon dioxide is CO₂. There are ____ atoms of carbon for every two atoms of ____.
one-oxygen
Each sphere represents one atom. Different-colored spheres represent atoms of different elements. , State whether sulfur dioxide is an element or a compound. Explain your decision.
compound because it is made up of more than one type of element chemically bonded together.
give the name of the process and state where the named substance would be at the end of the process : Sand from a mixture of sand and water
Process: Filtration Where is the substance? The sand remains as residue on the filter paper, while the water passes through as filtrate.
give the name of the process and state where the named substance would be at the end of the process : Salt from a solution of salt in water
Process: Evaporation ( Where is the substance? The water evaporates, leaving the salt behind as solid crystals.
True or false and fix the false\:A mixture is made up of different substances that are chemically joined together.
false , not chemically bonded
Salt is the solute, and water is the ------
solvent.
What is the correct definition of a solution? (1 mark) A. A chemically bonded substance. B. A mixture of a liquid with a solid or gas where the components remain separate. C. A mixture of a liquid with a solid or gas where the components ar
A mixture of a liquid with a solid or gas where the components are evenly distributed.
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