tubings with 10 ml of the given substances accurately. Next‚ once the substances have been put into the tubes‚ with two finger‚ smooth the end of the tubing sso to release the excess air. Once that is done‚ proceed to clamp the other side encasing the solution. Make sure no leaks are present. Next‚ the team will proceed by placing each distinct dialysis tubing into the 6 beakers with distilled water before. Make sure the beakers and everything is labeled accordingly so no confusion is possible‚ as so:
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Crossing Brooklyn Ferry Whitman’s poem “Crossing Brooklyn Ferry” seeks to determine the relationship of human beings to one another across time and space. Whitman wonders what he means (not as a poet but as another anonymous individual) to the crowds of strangers he sees every day. In stanza 3 the speaker says‚ “I am with you‚ you men and women of a generation‚ or ever so many/ generations hence”. He assumes that they see the same things he does‚ and that they react in the same way‚ and that
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b.) The mass decreased or increased in each cylinder‚ depending on if the solution was hypotonic‚ hypertonic or isotonic. In Cylinder (A) the mass decreased‚ so liquid was released from the potato‚ because the cells in the potato would have burst if even more was absorbed‚ whereas the length stayed the same. In Cylinder (B) the mass and length increased‚ which means the potato cells absorbed some Sodium Chloride (NaCl)‚ so the cells don’t shrivel up and die. For Cylinder 3 the mass and length also
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water is hypertonic (lower water concentration) and the human body is hypotonic (higher water concentration)‚ causing the water inside the human body to move from its high concentration to the ocean’s low concentration. Bag 1 represents an isotonic solution‚ where the
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and the final change in temperature for urea was 2.09 °C. To cause these results‚ ammonium chloride‚ which is a salt of a weak base‚ more than likely dissociated into ammonium ions and chlorine ions‚ resulting in twice as many more particles in solution than urea‚ which probably doesn’t dissociate much or at all‚ in the water/ice
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them. When they are heated this water evaporates‚ the crystals become dehydrated and turn white. Equation for this Reaction. CuSo4 5H2O ---> CuSo4 + 5H2O Solute- Solid which is dissolving Solvent- liquid in which the solute dissolves Solution- the solute and solvent mixed together Sodium hydroxide- Soluble Copper Oxide- insoluble Calcium hydroxide- Insoluble Silver iodide- insoluble Aluminium nitrate- soluble Most ionic substances will dissolve in water but covalent substances
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as medicine where those substances might be used as medications Crystallization is based on the principles of solubility: compounds (solutes) tend to be more soluble in hot liquids (solvents) than they are in cold liquids. If a saturated hot solution is allowed to cool‚ the solute is no longer soluble in the solvent and forms crystals of pure compound. Impurities are excluded from the growing crystals and the pure solid crystals can be separated from the dissolved impurities by filtration. Chemical
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dissolve in 100ml at 40 C because the temperature would have to be at least 69 C for it to dissolve completely. 8. In order to make a saturated solution at 55 C you must have 70 g of KNO3 9. You would need about 14g at the min. to grow a crystal. For best results the temp. Should be heated up to 20 C to get that KNO3 to crystallize. Certain solutions grow different things due to the amount of chemicals and heat is applied. 10. Conclusion: In conclusion we found that the more KNO3 you add the
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ZOOL 1 Lecture 3 1 2 ¡ ¡ ¡ ¡ Chemical substances that cannot be broken down to simpler forms by ordinary chemical reactions Atom Atomic number Atomic mass Compound Molecule Macromolecule 3 ¡ ¡ ¡ ELEMENT Oxygen Carbon Hydrogen Nitrogen Calcium Phosphorus Potassium Sulfur
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1molecule = 2.8 x 1016 molecules 2.1 x 10-15 cm² 3. Moles of stearic acid in monolayer Average drops of stearic acid to make up the monolayer = 6 Average drops of stearic solution in 1 mL = 96 ml of stearic acid in monolayer = 6 / 96 = .0625 ml
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