|Chemistry Review 1 |TEACHER ANSWER KEY | | |June 06‚ 2011 | | | |’see explanation below’
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temperature‚ concentration of reactants‚ and presence of catalysts‚ on the rate of a reaction. The rate law of a reaction was determined using the initial rates of method. Data gathered from six different runs of a reaction between thiosulfate and hydronium ion was used to plot a linear equation based on the Arrhenius equation. From the equation‚ the activation energy‚ Ea‚ of the reaction was obtained with an experimental value of 58.03 kJ/mol. The experiment showed that higher temperature leads to an increase
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Equation form for silver halides: Ag + + e - Ag Species produced include: Ag2+‚ Ag2o‚ Ag3+‚ Ag3o‚ Ag4+‚ Ag4o In 1556‚ the alchemist Fabricius was the first to discover that light can photochemically react with these crystals to change the silver ions (Ag+) to elemental silver (AgO). As the reaction proceeds‚ the silver atoms grow into clusters‚ which are large enough to scatter light and produce colors in a pattern identical to that of the original light source. Photography utilizes this chemical
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become soluble in water‚ potassium iodide is added‚ forming triiodide (MEL Science‚ 2015). When reacted with starch attach to structures within a starch molecule‚ leading to a blue-black colour (Ophardt‚ 2003). Starch is a carbohydrate‚ which contains two types of polysaccharides that are connected in two different ways‚ linear amylose and branched amylopectin (Goedecke‚ 2016). When iodine reacts with amylose‚ the iodine ‘gets stuck’ in the starch coils‚ forcing the ion/iodine to become linear as well
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membrane through color change and sugar tests. 2. To speculate osmosis occurring in dialysis bags and potato cores by comparing percentage change in masses. Background information: Molecules are always in random‚ constant movement due to their kinetic energy. This causes the molecules of a cell to move around and bump into each other. The random movement of molecules from an area of high concentration to low is called diffusion. Osmosis‚ a specific kind of diffusion with respect to water takes
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hydrophobic effect. c) disulphide bridges form. d) thermal energy randomly achieves the most stable conformation. e) polar residues form hydrogen bonds within the protein. 5. If an aqueous solution has a hydrogen ion concentration of 10 -5 M what is the concentration of the hydroxyl ion? a) 10-5 M b) 10-7 M c) 10-9 M d) 10-11 M 2 e) 10-13 M 6. An acid‚ HA‚ has a concentration of 0.075 M and its conjugate base‚ A- ‚has a concentration of 0.025M at pH 6. What is the pKa of HA? a) b)
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statement below. a. halide ion e. valence electron b. octet rule f. coordination number c. ionic bond g. metallic bond d. electron dot structure ____ 1. an electron in the highest occupied energy level of an atom ____ 2. Atoms react so as to acquire the stable electron structure of a noble gas. ____ 3. a depiction of valence electrons around the symbol of an element ____ 4. an anion of chlorine or other halogen ____ 5. the force of attraction binding oppositely charged ions together ____ 6. the
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parameter confirms the feasibility for industrialization. Having exchange property with acid and base together. The resulting resins show good properties for the removal and even recovery of heavy-metal ions from their aqueous solutions or wastewater [33]. The Na form of two chelating ion exchange resins Chelex 100 (Bio-Rad) and Amberlite IRC 748‚ both of which have iminodiacetic acid function group‚ was used to exchange Cu2+ and Zn2+ from aqueous solutions. It was shown that the rate constants
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the electrodes. What is electrolysis? Ionic substances contain charged particles called ions. For example‚ lead bromide contains positively charged lead ions and negatively charged bromide ions. Electrolysis is the process by which ionic substances are decomposed (broken down) into simpler substances when an electric current is passed through them. For electrolysis to work‚ the ions must be free to move. Ions are free to move when an ionic substance is dissolved in water or when melted. For example
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Bio 1610 Vocabulary Words CH 1-4 CH 1 Emergent Properties- The greater good‚ bike parts in a box = useless‚ put them together = useful. Systems Biology- Using data to predict the function or result of an affect or variable has on a biological system. Biosphere- The earths atmosphere‚ the earths crust‚ the life in the ocean etc. Ecosystem- A community of organisms and their physical environment‚ ie- the dessert‚ a coral reef‚ a jungle etc. Community- All of the groups of animals or
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