TREATMENT OF CORROSION Regardless of the type of corrosion or the metal involved‚ corrosion treatment requires three basic steps: 1. Remove as much of the corrosion as possible. 2. Neutralize any residual material. 3. Restore the protective surface film. CORROSION REMOVAL As previously discussed‚ the first step in corrosion control must be cleaning the surface. After the surface is completely clean and it is determined that corrosion does exist‚ the damage must be carefully assessed
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on the reaction of magnesium and salt water to produce hydrogen: Mg (s) + 2H2O (l) -> Mg2+ (aq) + H2 (g) ↑ + 2OH- (aq) s: solid; l: liquid; g: gaseous; aq: in solution; the vertical arrow indicates that gas is released. This reaction is very slow‚ due to passivation‚ so to speed it up‚ iron and salt are added. Passivation is the process by which a material is made less reactive‚ usually by the deposition of a layer of oxide on its surface: if you place a strip of magnesium into cold water‚ its
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state of reactants‚ and a catalyst. This experiment regarding the factors that affect reaction rate tests the effects of increased concentration and temperature of the hydrochloric acid solution (HCl) and also the effect of increased surface area of magnesium metal (Mg). When glow sticks are immersed in a hot water bath‚ it is proven that they glow with greater intensity. This proves that an increased temperature has an effect on the reaction itself‚ allowing molecules that make up the liquid inside the
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|c. |nitrogen(II) oxide | |b. |nitrogen dioxide |d. |nitrogen oxide(II) | ____ 29. Name the compound SO2 using the Stock system. |a. |sulfur(II) oxide |c. |sulfur dioxide | |b. |sulfur(IV) oxide |d. |sulfur oxide
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ANS: D OBJ: Goal #3.1: Interpret‚ predict‚ and write formulas for ionic and molecular compounds 5. What charge is most commonly observed for an oxide ion? a.|3-| b.|2-| c.|1-| d.|1+| ANS: B OBJ: Goal #3.1: Interpret‚ predict‚ and write formulas for ionic and molecular compounds 7. What is the formula for magnesium oxide? a.|MgO| b.|Mg2O| c.|MgO2| d.|Mg2O3| ANS: A OBJ: Goal #3.1: Interpret‚ predict‚ and write formulas for ionic and molecular compounds 8. What
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OXIDATION AND REDUCTION Oxygen makes up only about 20% of the air‚ yet is the essential component for so many reactions. Without it fuels would not burn‚ iron would not rust and we would be unable to obtain energy from our food molecules through respiration. Indeed animal life on the planet did not evolve until a certain concentration of oxygen had built up in the atmosphere over 600 million years ago. The term oxidation has been in use for a long time to describe these and other reactions where
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causes nausea and vomiting Uses: • gastric antacid for hyperchlorhydria • for intestinal toxemia CALCIUM-CONTAINING ANTACIDS • dependent upon their basic properties • raise stomach pH to 7 • constipating • found in combinations with magnesium antacids 1. CALCIUM CARBONATE • precipitated chalk • fast action • found in combinations with Mg antacids • in Lozenges and Oral suspension 2. TRIBASIC CALCIUM PHOSPHATE • Precipitated Calcium Phosphate‚ Tertiary Calcium
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Title: Physical and Chemical Properties Purpose: To investigate the physical and chemical properties of pure substances as distinguishing characteristics. Procedure: 1. Set up a well plate with 24 pieces and fill two with either Dilute HCl or Dilute NaOH. 2. Set up four test tubes with any single substance in each one. 3. Observe and record original color and odor of substance. 4. Light flame with matches. -Hold test tube with substance in it over flame with clamps -Observe and record
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Basseterre. His financial advisor Tyrah‚ has discovered a new technique for boosting company profit. If the company can cheaply extract the pure form of a new metal M from its oxide‚ the metal could be sold at 3x the price of production. What is the empirical formula of this oxide‚ given the following: Total mass of metallic oxide: 80.763 g Mass of metal is 74 % of the total mass (It was later discovered the new metal held 11 protons‚ 12 neutrons & 11 electrons) 4. Mr. Collins went home and wanted
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AgNO3 silver nitrate 7761-88-8 Ag2O silver oxide 1301-96-8 AgONC silver fulminate 5610-59-3 AgSNC silver thiocyanate 14104-20-2 Ag2C2 silver acetylide 7659-31-6 Ag2CO3 silver(I) carbonate 534-16-7 Ag2C2O4 silver oxalate 533-51-7 Ag2Cl2 silver(II) dichloride 75763-82-5 Ag2CrO4 silver chromate 7784-01-2 Ag2Cr2O7 silver dichromate Ag2F silver subfluoride 1302-01-8 Ag2MoO4 silver molybdate 13765-74-7 Ag2O silver(I) oxide 20667-12-3 Ag2S silver sulfide 21548-73-2
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