Example Problem with Complete Solution

2A-1 : Think About Tea 2 pts
Tea is a mixture of one or more tasty oils dissolved in hot water. Is this a heterogeneous or homogeneous mixture? Are there any conditions under which this tea can be considered to be a pure substance? Explain.
If the tea is well-mixed, perhaps by stirring, then the mixture can be adequately described as homogeneous.
As long as the composition remains constant and uniform throughout, a homogeneous mixture can be treated as a pure substance.  We call this a pseudo-component.