Water (a solvent) can dissolve copper chloride (a solute). Substance X didn’t dissolve any of the solvents until it was combined with water and detergent. Copper chloride is probably ionic because it was able to dissolve in water. Since water molecules have slightly positive hydrogens and slightly negative oxygens, the positive part of copper chloride is attracted to the oxygen in water and the negative part of copper chloride is attracted to the hydrogens in water. So it’s ionic because of its ability to dissolve in water. The solute, iodine, and the solvent, substance x, are non-polar because when they were mixed with water they did not dissolve. So, they were insoluble because the water molecule didn’t have anything to be attracted to. …show more content…
So, the slightly polar water molecules aren’t attracted to substance x, so substance x doesn’t mix with water. The copper chloride and water didn’t mix with the iodine and substance x because substance x is non polar. So, the slightly polar water molecules aren’t attracted to substance x, so substance x doesn’t mix with water. The detergent made the two solutions mix because part of the detergent’s molecule is polar and the other part is non polar. So, test tube 1 mixed with the polar part of the detergent and test tube 4 mixed with the non-polar part of the detergent, which allowed both test tubes to mix together. Since sugar can dissolve in water it is a polar molecule. Substance x (which is probably oil) is a nonpolar bond, so sugar won’t be soluble in it since polar bonds aren’t attracted to non-polar bonds. Since all the water molecules stick together when dropped on to the penny, the property of cohesion was evaluated. Also, since the molecules stuck to the penny the property of adhesion was also evaluated. The results turned out the way they did because water has hydrogen bonds which makes its properties of cohesion and adhesion stronger than those of
Then, an amount of KI (solid) about a size that would fit on a match head was dissolved in 0.05 of Potassium Iodate solution and about 1 mL of water and 1 mL of 1 M HCl were added, which exhibited a weak positive test for IO_3^- (aq). After the weak positive test, an amount of KI (solid) about a size that would fit on a match head was dissolved in about 1 mL of water and 1 mL of 1 M HCl, which exhibited a negative
Also, both their Ph level was 7 which mean that they are neutral and not acidic and reaction with iodine solution was exactly the same. Therefore, with all the experiments conducted and analyzed, icing sugar is the mystery substance. c) Q: Which properties, physical or chemical, were most useful in identifying the mystery powder? Explain your answer.
Investigate how the Concentration of Sucrose Solution affects the Mass of the Potato Chip Aim To find out how the concentration of sucrose solution affects the mass of the potato chip left in the solution for one day. Water Potential: The water potential of a solution is a measure of whether it is likely to lose or gain water molecules from another solution. A dilute solution, with its high proportion of free water molecules, is said to have higher water potential than a concentrated solution, because water will flow from the dilute to the concentrated solution (from a high potential to a low potential). Pure water has the highest possible water potential because water molecules will flow from pure water to any other aqueous solution, no matter how dilute. Prediction: Osmosis is the passage of water molecules from a weaker solution to a stronger solution, though a partially permeable membrane.
Firstly, an amount of 40.90 g of NaCl was weighed using electronic balance (Adventurer™, Ohaus) and later was placed in a 500 ml beaker. Then, 6.05 g of Tris base, followed by 10.00 g of CTAB and 3.70 g of EDTA were added into the beaker. After that, 400 ml of sterilized distilled water, sdH2O was poured into the beaker to dissolve the substances. Then, the solution was stirred using the magnetic stirrer until the solution become crystal clear for about 3 hours on a hotplate stirrer (Lab Tech® LMS-1003). After the solution become clear, it was cool down to room temperature. Later, the solution was poured into 500 ml sterilized bottle. The bottle then was fully wrapped with aluminium foil to avoid from light. Next, 1 mL of 2-mercaptoethanol-β-mercapto was added into fully covered bottle. Lastly, the volume of the solution in the bottle was added with sdH2O until it reaches 500 ml. The bottle was labelled accordingly and was stored on chemical working bench.
Dehydroascorbic acid and iodide ions are produced when ascorbic acid and iodine solution are mixed. Iodine has a brown color in solution whereas iodide
Aspirin is 3.3 g/L soluble in water (3). Aspirin can be soluble in ethanol, DMSO, or water (2). Aspirin has polar groups that when put with polar water molecules can form hydrogen bonds. Aspirin is an asymmetrical molecule. When drawing the Lewis Dot Structure, a person can see that the bonds are polar. There are also dipole moments making the molecule polar. Dipole molecules are composed of a higher electronegative atom pulling electrons towards it (11). It is more soluble in basic solutions than water and acidic solutions (4). The Lewis Structure also reveals that there are many double bonds between the carbons and two double bonds between oxygen and carbon.
The experiment we did was Copper Cycle. We reverted the copper to its elemental form after a chain of reactions. We performed a series of reactions, starting with copper metal and nitric acid to form copper (ii) nitrate. Then we reacted copper with sodium hydroxide, sulfuric acid, nitric acid and zinc to form precipitates. In conclusion our percent recovery was 40.38%.
Hydrochloric acid is polar substance and has a linear shape with an electronegativity difference of 0.9; it has weak dipole-dipole forces/bonds between its molecules (intermolecular forces) and polar covalent forces/bonds between the chloride and hydrogen ions (Intramolecular forces). (5) HCl has a molar mass of 36.4609 g.mol-1. HCl is fully miscible in water as it forms hydrogen bonds with the water. Hydrochloric acid has a melting point of 247K and a boiling point of 321K if in a 38% solution. 17
soluble. In other words, any way ap person gets it in his or her body, it will
The egg appeared shriveled after removing it from the sucrose because of the movement of water out of the egg. The sucrose solution was hypertonic so water moved out of the egg from an area where water was more concentrated to the outside of the egg where water was less concentrated due to the high amount of sugar or solute. The acetic acid in vinegar did remove the shell from the egg, because the egg required two days to completely remove the shell, some water did move into the egg causing its initial mass without the shell to be higher than the egg's mass with its shell. Whenever the egg was transferred from the sucrose to the distilled water, the concentration of water outside the shriveled egg was greater than the water concentration inside the egg; therefore, water moved into the egg until equilibrium was reached. At that point, movement into and out of the egg continued with no net movement of water
Solubility is defined as the maximum amount of a substance that will dissolve in a given amount of another substance at constant temperature and pressure. Solubility is typically expressed in terms of maximum volume or mass of the solute that dissolve in a given volume or mass of a solvent. Traditionally the equilibrium solubility at a given pH and temperature is determined by the shake flask method. According to this method the compound is added in surplus to a certain medium and shaken at a predetermined time. The saturation is confirmed by observation of the presence of un-dissolved material. Saturation can also be reached if the solvent and excess solute is heated and then allowed to cool to the given temperature. After filtration of the
The purpose of this lab to find if some certain compounds are made up of ionic or covalent bonds and to determine the properties of these compounds. This lab relates to the things we have been learning in class because compounds are part of our everyday life, so it’s nice to know some of the characteristics about it. In this lab we poured a small amount of the sample to a piece of labeled filter paper. To test the hardness, we separated a small amount of the sample and tried to crush it with the spatula. Next, we tested the conductivity of the sample by pouring each beaker with 30 mL of water. Then, Replace a paper clips on the edge of the beaker and if they were secure and partially under water. We then connected the wires to a battery and
The water molecule is a very small one but because of its unique properties it behaves like
1. The labels have fallen off of three bottles thought to contain hydrochloric acid, or sodium chloride solution, or sodium hydroxide solution. Describe a simple experiment which would allow you to determine which bottle contains which solution.
If the solid dissolved in the solvent at room temperature, then it was too soluble and that solvent could be eliminated. The acetanilide is completely dissolved in ethanol and dichloromethane, therefore eliminating them from being the suitable solvent. If the solid did not dissolve at room temperature then it was placed in the sand bath and left to boil. If the solid dissolved, it was placed in the ice bath and if crystals were observed coming out of the solution then the suitable solvent was found. The suitable solvent was water as the crystals came out once placed in the ice bath.