With iodine it changes to a brown color and becomes clumpy. Using the mystery powder key, experimental results were compared to know results of baking soda,baking powder,cornstarch and powdered sugar. Chemical changes were made when a substance fizzes up or changes color. When a substance fizzed up into bubbles, it indicated a reactivity of solubility and a chemical change. Physical changes were indicated when a substance only reacted once.
Pg. 459 #1-12 all 1.Explain why a suspension is considered a heterogeneous mixture. A suspension is a heterogeneous mixture because the particles may remain mixed with the liquid while the liquid is being stirred, but later they settle to the bottom. 2.Classify the following mixtures as homogeneous or heterogeneous: a. lemon juice- can be either, because with pulp it is heterogeneous, and without pulp it is homogeneous. b. tap water-homogeneous c. blood-heterogeneous d. house paint-homogeneous 3.In a solution, which component is considered the solvent?
Lipids- The materials used in this section were Water, piece of brown paper bag, and vegetable oil. Procedures- Protein-In this experiment we are testing for protein in each solution. We pour drops of biuret reagent into the different contents. If the liquid turns purple, then protein is active. Carbohydrates- In this experiment We test for starch.
Constants: The shape and size of the chocolate. HYPOTHESIS: I think that candies in wrappers will melt first because; I think the wrapper heats up. I also think that kisses chocolates will melt faster than bars. I believe that candies with a candy coating like M&Ms will melt slower than a candy without coating. I think the candy bar will melt differently because they have different ingredients on them.
This will occur because the water and glucose are small enough to diffuse out of the pores in the dialysis bag, but the starch molecules are too large to fit through 2. If a solution is very hypertonic, then the most amount of water will diffuse across the semi-permeable membrane into the dialysis tubing. This occurs because the higher concentration of solute, the more water it takes to reach equilibrium, thus, the faster rate of osmosis. 3. If we place the potato in a sucrose solution with a similar solute concentration as a potato, then the least amount of water will diffuse into or out of the potato cells.
Then by filtering, iodide can be extracted which when combined with other substances can make an iodine tincture, that is a pharmaceutical product. * Can a single substance be isolated from a mixture? Yes a single substance can be isolated from the seaweed mixture by using methods such as filtration and evaporation. In our experiment we used filtration using a filter paper funnel to extract the iodide from the tincture. * What is this substance This substance is iodide Confidence Report The aim of extraction, is to separate a part of raw material, using a solvent such as water with heat.
* Explain why flowers do not wilt as quickly if they are kept in water after they are cut. * Explain why strawberries begin to glisten with water minutes after having sprinkled some sugar on them. * Both salt and sugar are hygroscopic, meaning salt and sugar molecules will tend to attach themselves to any water in their environment --- removing loose water molecules from the environment. Recall the egg experiment! How would a high concentration of salt or sugar in your blood affect the movement of water molecules across cell membranes?
h) A way to make hard water softer is to put an sodium nitrate and create a precipitate to mellow out the reaction. Another way of making it softer is by removing the calcium ions one way of doing that is by boiling the solution to take out some of the ions. Conclusion: Overall, we determined that sodium carbonate, Na2CO3, is the anion that can be used to precipitate the most metal cations. Also, we learned that the anion sodium chloride, NaCl, could be used to remove silver ions from solutions. The stuff that I found interesting was that how many colours you can get when you mix the cations and anions
The "salts" part of the name comes from their appearance being similar to the crystals of common salt. Chemically speaking, all bath salts are true salts but the more organic salts commonly used in bath water (especially surfactants like soap) are not called "bath salts" because those appear more like wax or oil instead. Such salts include magnesium sulfate (Epsom salts), sodium chloride (table salt), sodium bicarbonate (baking soda), sodium hexametaphosphate (Calgon, amorphous/glassy sodium metaphosphate), sodium sesquicarbonate, borax, and sodium citrate. Fragrances and colors are often added to bath salts; in fact, one purpose of salts is as a vehicle or diluent to extend fragrances which are otherwise too potent for convenient use. Other common additives to bath salts are oils (agglomerating the salts to form amorphous granules, the product being called "bath beads" or "bath oil beads"), foaming agents, and effervescent agents.
Everyone wants to have as many gadgets as possible because they believe that gadgets would increase comfort and convenience. They think that it is important to rely upon technology as it represents the ability of equipment skill as well as living status. The society is certain that the more gadgets they have, the more established their life would be. This is because technologies such as mobile phone, treadmill, play station and many more are expensive and can only be used by people who are technology savvy. Despite of this believe, less do people know that too many technologies lead to obesity as people are not physically active.