I have 2 question on science 7. please help me.
1.state whether each substance is a mechanical mixture, a suspension, or a solution. My answers are at the bottom.
a)green relish
b)soda pop in a glass
c)bubble tea
d)traditional Aborigial paint made of red orchre and grease
my answers=
a)suspension
b)solution
c)suspension
d)mechanical mixture
2.suppose that you dissolve 250ml of drink crystals in 1000ml of water. You get 1175ml of drink rather than 1250ml. how can you use the partical model of matter to explain this?
I have bean waiting for more than 2 hours and no one is helping me.
Our chem prof isn't online yet. I'm sorry it's taken so long, but please remain patient.
1. To determine whether each substance is a mechanical mixture, a suspension, or a solution, you can think about the characteristics of each type and how they apply to the given substances.
a) Green relish: Green relish is made up of chopped pickles and other ingredients in a liquid medium. Based on its appearance, where you can see discrete particles or solids suspended in the liquid, it can be classified as a suspension.
b) Soda pop in a glass: Soda pop is made by dissolving carbon dioxide gas in water with added sweeteners and flavorings. Since dissolved gases form a homogeneous mixture with the liquid, soda pop can be classified as a solution.
c) Bubble tea: Bubble tea consists of flavored tea mixed with milk or fruit juice, and typically includes tapioca pearls or other solid additives. Similar to the green relish, bubble tea contains visible solid particles suspended in a liquid, so it can be classified as a suspension.
d) Traditional Aboriginal paint made of red ochre and grease: Traditional Aboriginal paint is typically made by mixing red ochre (a naturally occurring pigment) with grease or oil. In this case, the red ochre particles are mixed with the grease without completely dissolving, resulting in a mechanical mixture.
Your answers for these substances are mostly correct. Green relish and bubble tea contain visible suspended particles, making them suspensions. Soda pop is a solution because the gas molecules are dissolved evenly throughout the liquid. And the traditional Aboriginal paint is a mechanical mixture because the red ochre particles are mixed with the grease without dissolving.
2. When you dissolve 250ml of drink crystals in 1000ml of water but end up with 1175ml of drink instead of the expected 1250ml, you can use the particle model of matter to explain the discrepancy.
According to the particle model of matter, when a solute (in this case, the drink crystals) dissolves in a solvent (water), the individual solute particles become dispersed and fill the spaces between the solvent particles. As a result, the total volume increases slightly due to the addition of the dissolved particles.
In this scenario, it is likely that the dissolved drink crystals occupy some of the empty spaces between the water molecules, causing the final volume to be slightly larger than the sum of the initial volumes of the drink crystals and water. Therefore, the increase in volume from 1000ml to 1175ml can be attributed to the dispersed particles of the drink crystals occupying additional space within the solution.