insoluble that they resist weathering and leahcing action in rainwater. Its common oxidation states is 2. Magnesium forms many compounds. The oxide‚ hydroxide‚ chloride‚ carbonate‚ and sulfate are commercially important. They are used in ceramics‚ cosmetics‚ fertilizers‚ insulation‚ leather tanning‚ and textile processing. Common Uses . The coating protects the metal‚ particularly magnesium‚ from further oxidation. This allows alloys of these metals to be used as low density structural materials
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Table of Contents Abstract ...2 Introduction ....................................................................................................................3 Theoretical Aspects 4 Affects of light intensities on plant photosynthesis measured by the amount of oxygen produced ..5 Experimental Aspects 6 Factors that Affect the rate of photosynthesis ...........7 Investigating
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Surname Centre No. Initial(s) Paper Reference 4 3 3 5 Candidate No. 2 H Signature Paper Reference(s) 4335/2H Examiner’s use only London Examinations IGCSE Team Leader’s use only Chemistry Paper 2H Higher Tier Wednesday 17 June 2009 – Morning Time: 2 hours Materials required for examination Nil Items included with question papers Nil Question Leave Number Blank 1 2 3 4 5 6 7 8 9 Instructions to Candidates In the boxes above‚ write your centre number‚ candidate number‚ your surname
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KI masses‚ and the three volumes (from the three trials) needed to titrate the bleach Calculations (Data and Calculations Section in lab) 1. Use the equations given on the front page to determine the number of moles of sodium thiosulfate that are equivalent to one mole of sodium hypochlorite. 2. From your three trials‚ calculate the average volume of Na2S2O3 needed for the titration of 25.00mL of diluted bleach. 3. Use the average volume and the molarity of Na2S2O3 to determine the molarity of
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purpose of this lab was to find the molar ratio of NaClO and an unknown substance labeled solution “B”. Using the method of continuous variation the ratio of the two solutions were changed but kept equal to 50 mL. The reaction was an exothermic oxidation-reduction and the temperature change was measured to determine which ratio of NaClO to solution “B” was optimal. The ratio with the highest temperature change was 40mL of NaClO to 10 mL of solution “B”. Once simplified‚ this means the ratio is 4:1
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N10/4/CHEMI/SP2/ENG/TZ0/XX 88106105 CHEMISTRY STANDARD LEVEL PAPER 2 Thursday 11 November 2010 (afternoon) Candidate session number 0 1 hour 15 minutes 0 INSTRUCTIONS TO CANDIDATES • • • • Write your session number in the boxes above. Do not open this examination paper until instructed to do so. Section A: answer all of Section A in the spaces provided. Section B: answer one question from Section B. Write your answers on answer sheets. Write your session number
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Experiment 4 Guide Questions for Discussion Iron-Silver Equilibrium 1. Give the balanced net ionic equation for the reaction between Fe2+ and Ag+. What is the chemical formula of the gray precipitate? Answer: Fe2+(aq) + Ag+ (aq) Fe3+(aq) + Ag (s) The formula of the precipitate is Ag(s). 2. Give the balanced net ionic equation for the reaction of Fe2+ with Fe(CN)63-. a. What is the chemical formula of the Prussian blue precipitate? b. How does
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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 Ag2SO4 silver sulfate 10294-26-5 Ag2SeO3 silver selenite 7784-05-6 Ag2SeO4 silver selenate
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or shrink under various osmotic conditions (iso- vs. hyper- vs. hypotonic solutions). Draw on your lab experiments for practical application! Use key terminology to describe transport processes (i.e. the tonicity of the solution) Describe the sodium-potassium pump—what type of transport is this useful for? Compare endocytotic and exocytotic transport mechanisms in bulk transport. Metabolism Describe metabolism— (what are other words we have used for these processes? Define energy and use
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contain oxidizing agents. Some products‚ which contain oxidizing agents‚ are bleaches‚ hair coloring agents‚ scouring powders‚ and toilet bowl cleaners. The most common oxidizing agent in bleaches is sodium hypochlorite‚ NaClO (or NaOCl). Commercial bleaches are made by bubbling chlorine gas into a sodium hydroxide solution. Some of the chlorine is oxidized from the molecular form (Cl2) to the hypochlorite ion‚ ClO-. Some of the molecular form is also reduced to the chloride ion‚ Cl-. This type of
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