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C2 precipitates and ions testing

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Question
Answer
What is the chemical test for Ca+2 ion?   when the compound is placed in a flame, the flame turns red  
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What is the chemical test for Cu+2?   when the compound is placed in a flame, the flame turns green  
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What is the chemical test for Cl-?   Add Nitric acid then silver nitrate AND acid solution; a white precipitate forms  
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What is the colour of the flame when you burn Na+ ions?   Yellow  
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What is the colour of the flame when you burn K+ ions?   Lilac  
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What is the chemical test for CO3-2?   Fizz on addition of HCl; the gas produced will turn limewater cloudy  
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What is the chemical test for SO4-2?   add Hydrochloric acid then barium chloride solution; a white precipitates forms  
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What kind of ions does a flame test help identify?   Metallic ions  
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Lead iodide is an insoluble salt. Describe the steps needed to prepare a pure, dry sample of lead iodide from solutions of lead nitrate and potassium iodide.   mixing solutions in a beaker filtering off the precipitate, including apparatus washing the precipitate drying the precipitate (oven/between filter papers)  
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Describe the tests you could carry out on a sample of water to show that it contained dissolved Potassium Carbonate   sodium (ions) cause a yellow flame(1) for chloride ions: add dilute nitric acid (1) add silver nitrate (solution) (1) white precipitate/solid forms (1)  
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Lead Iodide is insoluble. What solution could you add to Lead Nitrate to make Lead Iodide?   Sodium Iodide. Or Potassium Iodide.  
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What is the name of the precipitate formed when Barium Nitrate is added to Sodium Sulfate?   Barium Sulfate  
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What is Barium Sulfate used for?   To help with X-rays of the intestines  
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Why do we ask patients to eat Barium Sulfate when they need an X-Ray of the intestines and yet Barium ions are toxic?   Because Barium Sulfate is insoluble so there are no Barium ions able to go into the blood.  
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What is a precipitate?   A precipitate is formed when two solutions are mixed and an insoluble compound forms; the precipitate is the insoluble compound  
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Are Nitrate salts soluble or insoluble?   Soluble  
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Are Sodium Salts soluble or insoluble?   soluble  
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When barium chloride solution, BaCl2, is added to sodium sulfate solution, Na2SO4, a white precipitate of barium sulfate, BaSO4, is formed. Write the balanced equation for this reaction.   Word equation first: barium chloride + sodium sulfate --> barium sulfate + sodium chloride Formulae: BaCl2 + Na2SO4 --> BaSO4 + NaCl Balancing: BaCl2 + Na2SO4 --> BaSO4 + 2 NaCl  
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What is the trick to remember the salts that are always soluble?   SNAP; Sodium Nitrate Ammonium Potassium salts are always soluble  
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What are the 3 insoluble salts that you MUST remember?   Calcium Carbonate; Barium Sulfate and Silver Chloride  
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When calcium chloride solution, CaCl2, is added to sodium carbonate solution, Na2CO3, a white precipitate of barium sulfate, CaCO3, is formed. Write the balanced equation for this reaction.   Word equation first: calcium chloride + sodium carbonate--> calcium carbonate + sodium chloride Formulae: CaCl2 + Na2CO3 --> CaCO3 + NaCl Balancing: CaCl2 + Na2CO3 --> CaCO3 + 2 NaCl  
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What is the formula of Magnesium Chloride?   get the CHARGES from the Periodic table: Mg+2 and Cl-1; then SWAP THE NUMBERS and write at the bottom: Mg1Cl2  
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What is the formula of Magnesium Nitrate?   get the CHARGES from the Periodic table or LEARN special groups: Mg+2 and (NO3)-1; then SWAP THE NUMBERS and write at the bottom: Mg1(NO3)2  
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What is the formula of Sodium Sulfate?   get the CHARGES from the Periodic table or LEARN special groups: Na+1 and (SO4)-2; then SWAP THE NUMBERS and write at the bottom: Na2(SO4)1  
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What two solutions could you use to make a precipitate of Silver Chloride?   Silver nitrate and Sodium chloride; both chemicals are soluble because of SNAP  
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What is the formula of Barium Sulfate?   get the CHARGES from the Periodic table or LEARN special groups: Ba+2 and (SO4)-2; then SWAP THE NUMBERS and write at the bottom: Ba2(SO4)2; check if you need to CANCEL when both subscripts are 2: Ba(SO4)  
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