Chemistry All about matter There are three different stages of matter: Solid‚ Liquid and Gas Solid (s): Have a certain volume and shape. “Particles” are arranged in a specific crystalline patter and they only vibrate around fixed positions. Liquid (l): Have a fixed volume‚ but not shape. The particles have some freedom and can move around each other. They collide often. Gas (g): Doesn’t have a fix volume or shape. (Takes up the space where it is) Particles move freely in all space available
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chlorine-containing metabolites‚ such as chlorite and chloride ions. Abdel-Rahman et al. (1980b) developed a method to quantitatively and qualitatively measure the metabolites of chlorine dioxide (e.g.‚ ClO2-‚ and ClO-) in biological fluids. These biomarkers can be used to indirectly measure chlorine dioxide exposure. The concentration of residual chlorite ion in vegetables and eggs treated with sodium chlorite was determined by UV-ion chromatography (Suzuki et al. 1997). Sodium chlorite was extracted
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CHAPTER-23 HW. Rahaf AlBathi 121114 Question 1 The electron configuration of a Ni2+ ion is: | A) [Ar]4s23d8 | | B) [Ar]4s23d6 | | C) [Ar]3d8 | | D) [Ar]3d6 | Question 2 The Fe3+ ion has _____ electrons in 3d orbitals. | A) 6 | | B) 5 | | C) 4 | | D) 3 | | E) 2 | Question 3 A ligand is: | A) a molecule or ion that has at least one lone pair of electrons | | B) a nucleophile | | C) a Lewis base | | D) part of a coordination compound |
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Christy Chan (5) BIOLOGY LAB REPORT Investigation of the effect of metal ions on enzyme activity Objective To study the effect of two heavy metal ions‚ lead (II) ions and silver ions on the enzyme activity of invertase. Introduction Hypothesis: The rate of enzyme reaction of invertase decreases and the reaction eventually stops as the heavy metal ions inhibit the enzyme reactions. Biological principle: Heavy metal ions are non-competitive inhibitors. They do not compete with the substrates
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experiment‚ equilibrium will be examines in the reaction beteween the iron (III) ion and the thiocyanate ion: Fe3+ (aq) + SCN- (aq) ------ FeSCN2+ (aq) The FeSCN2+ complex ion has a blood red color while the iron and the thiocyanate ion are colorless. Therefore‚ the shift in the reaction can followed by noting a change in the intensity of the clood red color‚ which indicates a change in the concentration of the complex ion FeSCN2+. If the reaction shifts to the right‚ the blood red color will get darker
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The solution in the test tube from step 9 contains the Cu2+ ions. To this solution‚ add 1 mL of 3% H2O2. Boil the solution down to a volume of about 1 mL. Now add 6 M HCl until the pH reaches 0.5. Once the pH has been lowered to 0.5‚ add 1 mL of 1 M CH3CSNH2 (thioacetamide) to the test tube. 15. Heat the
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substance present‚ but rather is simply used to confirm its existence. It is mainly focused on detecting ions in an aqueous solution. The solution is treated with reagents to test for reaction characteristics of certain ions‚ which may cause color change‚ solid forming and other obvious visible changes. The cations to be studied include some common alkaline earth metals‚ group 13 and Zn2+. These ions are not colored in solution‚ and most of their compounds are white. It is impossible therefore to use
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1 What changes when an ion is formed from an atom? A. Neutrons are lost or gained. B. Protons are lost or gained. C. The nucleus disintegrates. D. Electrons are lost or gained. E. Either protons or electrons are lost or gained. 2 When comparing a 10.00 g sample of iron with a 10.00 g sample of lead: A. each sample has the same number of atoms. B. there are more iron atoms than lead atoms. C. there are more lead atoms than iron atoms. D. it is not possible to tell which sample contains
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LAB REPORT 6 – IONIC REACTIONS No credit will be given for this lab report if the Data section is not completely filled out. OBJECTIVES 1. Study the nature of ionic reactions 2. Write balanced equations 3. Write net ionic equations for precipitation reactions PROCEDURE Please complete the entire experiment as instructed in the lab manual except for any modifications noted below. Fill out the report below‚ insert your digital photographs into the report‚ and submit it me electronically
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And for high oxidation rates such as in ClO_3 the suffix -ate is used‚ so that this compound would be named chlorate.When dealing with polyatomic ions it is important to add parenthesis‚ within the chemical formula because when calling for more than one atom‚ you must increase the ion as a whole not just one of the elements. With covalent bonds‚ that is‚ bonds in which electrons are shared between atoms often require more than one atom to balance oxidation numbers
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