Would Flame test be useful for detecting metal ions present in a mixture of metal ions?? It is not a reliable method. Atomic spectroscopy would be much more accurate and sensitive than the human eye. To add to the information

24,851 results

  1. Chemistry

    Which argument supports the claim that dissolving solid calcium chloride (CaCl2) in water is a chemical change? A. The ionic bond between the calcium ions and chloride ions is broken. B. The solid calcium chloride can be recovered by evaporating the water.

  2. Chemistry

    when 25.0 mL of a solution containing both Fe2+ and Fe3+ ions is titrated with 23.0 mL of 0.0200 M KMnO4 (in dilute sulfuric acid). As a result, all of the Fe2+ ions are oxidized to Fe3+ ions. Next, the solution is treated with Zn metal to convert all of

  3. chemistry

    Lithium metal dissolves in water to yield hydrogen gas and aqueous lithium hydroxide. What is the final concentration of hydroxide ions when 5.500 g of lithium metal is dropped into 750. mL of water?

  5. Chem

    According to the Arrhenius Theory of acids and bases, a base is: A A substance that decrease the amount of hydroxide ions present. B A substance that increases the amount of hydroxide ions present when it is dissolved in water. C A substance that increase

  6. chemistry.

    a quantity of 25 ml of a solution containing both Fe2+ and Fe3+ ions is titrated with 23 ml of .02 M KMnO4 solution. as a result all the Fe2+ ions are oxidised to Fe3+ ions. Next the solution is treated with Zn metal to convert all Fe3+ ions to Fe2+ ions.

  7. Chemisrty

    Would Flame test be useful for detecting metal ions present in a mixture of metal ions?? It is not a reliable method. Atomic spectroscopy would be much more accurate and sensitive than the human eye. To add to the information provided by Bob Pursely, which

  8. Physics

    A manufacturer selected a metal to use in producing a lightweight button for clothing. A metal that has a density of 2.71 g/cm3 was selected. Which of the metals was selected? A Metal 1 B Metal 2 C Metal 3 D Metal 4

  10. Chemistry

    Which of the following transition metal ions has a color? Cr3+ , hg2+, v2+ How can you predict that? I don't understand!!

  11. Chemistry

    You are given a jar containing a mixture of three different solid substances. The particles of each substance are larger than 0.5 cm in diameter. All you know about the substances is that each is a pure metal. Describe a method for determining the

  12. chemistry

    Chromium metal can be plated onto an object from an acidic solution of dichromate ions. What average current is required to plate 17.8 g of chromium metal in a time of 2.20 h?

  13. chemistry

    Based on the chemical formula, what type of compound is sodium fluoride (NaF)? Why? Sodium fluoride is an ionic compound because it is composed of a positive and negative ion (metal and nonmetal). A metallic compound would have multiple metal atoms bonded

  15. Science

    Ionic compounds dissolve in water, and their ions separate from each other. If a sample of Al2S3 containing 16 aluminum ions is dissolved in water, how many sulfide ions will be present? So, two cations and three anions. Would we have one sulfide ion left?

  16. Chemistry- Dr.Bob222

    Which metal could you use to reduce Cr3+ ions but not Mn2+ ions? Which metal could you use to reduce ions but not ions? Zn Mg Ni Al

  17. Chemistry

    if metal A is placed in an ionic solution containing metal B ions and no reaction occurs, then metal B is most likely: A.) a halogen B.) higher on the activity series C.) not on the activity series D.) a catalyst

  18. Integrated Science

    What do positive hydrogen ions produce when they react with water in solution? A).hydroxide ions B).hydronium ions C).a salt D).negative hydrogen ions I believe the answer is A). Is this correct?

  20. chemistry

    Write the formula of the ionic compound that forms between a. copper(I) ions and chloride ions---CuCl b. copper(II) ions and hydrogen sulfate ions--Cu(HSO4)2 c. lithium ions and iodide ions--LiI d. cobalt(III) ions and phosphate ions---CoPO4

  21. College Chemistry

    a solution contains .25M Ni(NO3)2 and .25 M Cu(NO3)2. Can the metal ions be separated by slowly adding Na2CO3?Assume that for successful separation 99% of the metal ion must be precipitated before the other metal ion begins to precipitate, and assume no

  22. CHEMISTRY

    1.List all the ions that cause a red flame and produce a precipitate in the presence of hydroxide ions. 2.List all the cations that could cause the red flame and produce a precipitate in the presence of sulfate ions. 3.

  23. Chemistry

    Would flame test be useful for detecting metal ions present in a mixture of metal ions?

  25. Chemistry

    When 1914.8C of electricity was passed through two electrolytic cells connected in series 0.6g of a metal M1 was deposited in one of the electrolyte, if 2.14g of another metal M2 was deposited at the other cathode and the sum of the quantity required to

  26. Physics

    You are asked to consult for the city's research hospital, where a group of doctors is investigating the bombardment of cancer tumors with high-energy ions. The ions are fired directly toward the center of the tumor at speeds of 5.6 ×106m/s. To cover the

  27. chemistry

    how do you know which halide salts confirms a presence of F- ions, Cl- ions, Br- ions, and I- ions?

  28. chem

    A blood sample contains several different types of cells, each of which contains different combinations of specific ions and molecules. The cells are suspended in water, and the water also contains many molecules and ions. Which term or terms could be used

  30. Chemistry

    Regarding Flame Tests, why do you have to subject the sample to a flame? Which part of the Bunsen Burner is hottest? Why is it necessary to hold the loop in this part of the flame? What do you think will happen if you perform the flame test on a solution

  31. AP Chemistry

    Consider the following reaction: PbCl2 + 2 NaOH → Pb(OH)2 + 2 NaCl What would be the major species observed floating in solution after one mole of PbCl2 and 2 moles of NaOH are mixed in aqueous solution? 1. Na+ ions, Cl− ions and H+ ions 2. Pb2+ ions,

  32. Chemistry

    Consider the following reaction: PbCl2 + 2 NaOH -> Pb(OH)2 + 2 NaCl What would be the major species observed floating in solution after one mole of PbCl2 and 2 moles of NaOH are mixed in aqueous solution? 1. Na+ ions, Cl− ions and H+ ions 2. Pb2+ ions,

  33. Chemistry

    sample of silver metal is suspected to be contaminated with zinc. A 0.2365 g portion of this metal is dissolved in nitric acid and the silver ions precipitated with excess aqueous NaCl. After filtering and drying, the mass of the precipitate is found to be

  35. Coordination Chemistry

    A particular metal ion octahedral complex has the same number of unpaired electrons (non-zero) whether the complex uses weak or strong field ligands. List several fourth period transition metal ions that could have this behavior. Also, if someone could

  36. chemistry

    A 37.0 g mass of a metal was heated to 100°C and then plunged into 74 g of water at 24.0°C. The temperature of the resulting mixture became 28.0°C. (a) How many joules did the water absorb? (b) How many joules did the metal lose? (c) What is the heat

  37. Chemistry

    How many (a) H+ ions and (b) OH" ions are present in 250 ml of a solution of pH3?

  38. Chemistry

    silver ions in a solution of silver salts can be recovered by immersing copper metal in the solution. crystals of pure silver are deposited on the silver metal. design an experiment to determine the number of moles of silver atoms that form describe the

  40. chemistry

    Would flame tests be useful for detecting metal ions present in a mixture of metal ions? Explain. In some cases, yes. In most cases, no.

  41. chem

    Which shows the greatest metallic character? -Na -K -Rb -Cs Also, What ions are very important for the proper functioning of biologic systems such as nerves and muscles? --oxygen ions --nitride ions --alkali metal ions --alkaline earth metal ions

  42. Chemistry

    1. List all the possible actions that give a red flame test and precipitate in the presence of sulfate ions. 2. If all traces of the two metal cations are removed from the solution at test 4, what might the flame colour be when a sample of the solution is

  43. Chemistry

    Regarding Flame Tests, why do you have to subject the sample to a flame? Which part of the Bunsen Burner is hottest? Why is it necessary to hold the loop in this part of the flame? What do you think will happen if you perform the flame test on a solution

  45. chemsitry

    What ions are very important for the proper fuctioning of biological systems such as nerves and cells? A)alkali earth metals B)hydrogen ions C)oxygen ions D)nitride ions E)alkali metal ions

  46. chemistry

    Hard” water contains large amounts of metal ions, especially ions of calcium and magnesium, but also iron. Hard water is often described as having a metallic taste. These metal ions can form precipitates with some anions in the water. These precipitates

  47. chem help ASAP!!!!

    What ions are very important for the proper fuctioning of biological systems such as nerves and cells? A)alkali earth metals B)hydrogen ions C)oxygen ions D)nitride ions E)alkali metal ions my choice is A or C can anyone help?

  48. Chemistry

    How did the metal atoms become ions? Metal atoms became ions by losing electrons to form positively charged ions(cations). How did the nonmetal atoms become ions? Nonmetal atoms became ions by gaining electrons to form negative ions(anions).

  50. Chemistry

    Can somebody help me with this question? Zinc metal is placed in a solution of copper ions and undergoes an oxidation-reduction reaction. Which direction is the spontaneous reaction? Zn metal goes into solution. Cu(II) ions come out. Zn + Cu+2 ==> Zn+2 +

  51. Chemistry

    We did a flame test today to see what substances produce what colors when burned. Can you please explain... Why each of the different elements have a different atomic emission spectrum? Would the flame tests be useful for detecting individual elements

  52. Chemistry

    In regards to atomic emission spectroscopy: Explain why the intensity of the color gets brighter when the metal salt concentration is higher. Salt is any ionic compound that has positive ions(called cations) and their associated negative ions (called

  53. Chemistry

    This has to do with the reactivity series for metals (K,Na,Ca,Mg,Al,Zn,Fe,Pb,Cu,Au,Ag) Which metal is most likely to undergo the conversion M(s)->M(n+)(aq)+ne- What type of reaction is this?-oxidation ? Which metal ion is most likely to undergo the

  55. Chemistry

    A solution containing a mixture of metal cations was treated with dilute HCl and no precipitate formed. Next, H2S was bubbled through the acidic solution. A precipitate formed and was filtered off. Then, the pH was raised to about 8 and H2S was again

  56. chem

    im studying for a test and i have no idea where to even start for this practice problem..?? a 0.15M(molarity im assuming)solution of BrCl2 contains.. a).15MBr2+ ions and .30M Cl- ions b).30MBr2+ ions and .15M Cl- ions c).15MBr2+ ions and .15M Cl- ions

  57. Chemistry

    How many unpaired electrons are there in the following transition metal ions in their hexacyano-complex ions? Fe^3+, Pd^2+,CO^2+

  58. science

    3) Some ionic compounds contain a mixture of different charged cations. For example, some titanium oxides contain a mixture of and ions. Consider a certain oxide of titanium that is 28.31% oxygen by mass and contains a mixture of and ions. Determine the

  60. Chemistry

    Are the ions of a metal very different from the atoms of a metal? Give some important differences in the properties you abserved.

  61. Chemistry

    Write the balanced equations for the reactions: a) Reduction of Ag+ Ions with metal Fe. b) Oxidation of metal Mg with Cu2+ ion.

  62. Chemistry

    Metal cations can act as lewis acids in water to produce an acidic solution even though the metal ion contains no hydrogen. Water hydrates the ions in solution and partial loss of electrons from water allows hydrogen ion to be lost What is the pH of a

  63. Chemistry

    We did a flame testing lab today with the following metal ions: Sodium, Na^+1 Barium, Ba ^2+ Calcium, Ca ^2+ Copper, Cu ^2+ Potassium, K ^+1 Strontium, Sr ^2+ Lithium, Li ^+1 The question asks to explain the effect of the nitrate ion solution on the color

  65. Chemistry

    When asked to name all of the ions and molecules present in a 0.1 mol L-1 solution of CH3COOH, why are there OH- ions present if the equation is CH3COOH(aq) + H2O(l) --> CH3COO-(aq) + H3O+(aq) ? The water ionizes in such a manner that the product of the

  66. chemistry

    I did an experiment where i put iron nail with zinc metal wrapped around it in agar solution. the solution turned pink. I have to find the anode: anode reaction: cathode (remember, a metal can be an inactive electrode): cathode reaction (there aren’t any

  67. Chemistry

    Do positive ions or the negative ions cause the change in flame color ? Explain why and give on example.

  68. Chemistry

    How many (a) H+ ions (1 g-ion/L = 6.023 x 1023 ions/L) and (b) OH- ions are present in 250 ml of a solution of pH 3?

  70. Biochemistry

    How many a) H+ ions (1 g-ion/L = 6.023 x 1023 ions/L) and b) OH- ions are present in 250 ml of a solution of pH 3?

  71. CHEMISTRY

    do the positive ions or the negative ions cause the change in flame color?

  72. Science

    When 25.0 ml of a solution containing both Fe2+and Fe3 +ions is titrated with 23.0 ml of 0.0200M KMnO4(in dilute sulphuric acid), all the Fe2+ are oxidised to Fe3+ ions. Next, the solution is treated with Zinc metal to convert all the Fe3+ ions to Fe2+

  73. Science

    Are the ions of a metal very different from the atoms of a metal?

  75. Ion Charge & Formulas of Ionic Compounds

    Can you please take a look at my questions. Thank you very much. 1.classify the law of definite proportions. In specific proportions, A type of compound always contains the same elements. Is this good? Any other info would be greatly appreciated. 2.how do

  76. Chemistry

    Why does only one of these ions (Co, Cu, or Ni) produce a positive flame test?

  77. Chemistry Plz hurrry

    What are charateristic of a ionic bond and a chemical bond? An ionic bond is a type of chemical bond that involves gain or loss of valence (outer shell) electrons in order to attain stability. That is not what I am looking for but thanks anyway An ionic

  78. Chemistry 130

    Can someone please help me and let me know if these questions and answers are correct? I just need a second opinion…and if there not correct can you help me…please?!? 1.(3). In the Arrhenius definition, an acid is a substance that a. turns litmus paper

  80. Chemistry 20

    Sorry, the 1st part to those 2 questions are: Hard water contains metal ions, most commonly calcium and magnesium ions. Some moderately hard water is found to contain 200ppm of calcium hydrogen carbonate.

  81. Metals

    Transition metals (also called heavy metals) form insoluble compounds with hydroxide ions. Therefore, it is possible to extract heavy metal ions from water by raising the pH. The precipitation reaction between cadmium(II) and hydroxide is shown below.

  82. Chemistry

    Is the flame coloration a test for the metal or for the acid radical?

  83. science

    Is the flame coloration a test for the metal or for the acid radical?

  85. chemistry

    is a flame coloration a test for the metal or for the acid radical?

  86. Chemistry

    is the flame coloration a test for the metal or for the acid radical?

  87. Chemistry

    I'm doing a flame testing lab in which I'm supposed to be able to identify an unknown element by observing the color it emits once heated. The color of the flame after heating this unknown metal is a light pinkish-violet. The question I need to answer asks

  88. chemistry

    An aqueous solution is analyzed and found to contain potassium ions and sulfite ions. Write the equation for the dissolution of the salt that produced this solution. If the solution contains 0.600 mol of potassium ions, how many moles of sulfite ions are

  90. Electrochemistry

    How much electric charge is needed to produce 1.000kg of Na metal from the Na+ ions in NaCl? You need one electron per atom. How many atoms are present in 1kg of Na? Use avagradros number. To change to coulombs, remember that 1 electron= 1.6E-19C

  91. chemistry

    what evidence supports the clarification that H2Se 03 is an acid and how do i identify the positive ions present inthe aqueous solution I am a little confused by the word "clarification" in your question. What evidence do you have? Could you measure the pH

  92. Chemistry

    metallocene are metals sandwiched by two cyclopentadienyl ions, (c5h5)–. a metallocene sample of unknown metal, mc5h5 (all 5 are subscripts) was burned in air. products of combustion found to contain 46.08488% carbon dioxide, 9.42644% water vapour and

  93. JVHS

    What will the ratio of ions be from a group 1A metal and a group 7A non-metal?

  95. Chem 2

    Need help.... calculate the theorectical yield of the compounds to be prepared in the experiment. The metal ion in both cases is the limiting reagent.Find nuber of moles of Cu(II) in the sample of CuSO4 x 5H2O that you used. The equal the number of moles

  96. Chemistry

    Hydrogen gas dissolves in palladium with the hydrogen molecules going into the spaces between the metal ions. Determine the molarity, molality, and percent by mass of the H2:Pd solution (d=10.8g/cm)containing 0.94g hydrogen gas dissolved in 215 grams of

  97. Chem

    Temperature of Bunsen Burner Flame: h t t p s : / / mashchemistry . wikispace s . com /file/ view/Temperature +of+a+ Bunsen+Burner+Flame ... p d f (couldn't put the link so I spaced it out) My data Table: Type of metal used: Cu Mass of metal object: 75.4 g

  98. Chemistry (moles)

    A 1.00L sample of seawater contains 19.4g of chloride ions, 10.8 g of sodium ions, and 1.29 g of magnesium ions. How many more moles of chloride ions would be needed to make neutral salts of all the cations in solution?

  100. chemistry

    Can you explain the electron configuration for the transition metal ions?

  101. Chemistry

    What is the principal of seperation of metal ions in qualitative analysis?

  102. Chemistry

    Need help.... calculate the theorectical yield of the compounds to be prepared in the experiment. The metal ion in both cases is the limiting reagent.Find number of moles of Cu(II) in the sample of CuSO4 x 5H2O that you used. The equal the number of moles

  103. Chem 2 HELP

    Need help.... calculate the theorectical yield of the compounds to be prepared in the experiment. The metal ion in both cases is the limiting reagent.Find number of moles of Cu(II) in the sample of CuSO4 x 5H2O that you used. The equal the number of moles

  105. chemistry

    How is the way metals form ions different from the way nonmetals form ions? Think about this. When Na, a metal, becomes an ion, what must it do? It has one electron in its outside shell. When Cl, a non-metal, forms an ion, what must it do? It has seven

  106. chem

    A greenish blue salt known to be composed of copper and chloride ions is dissolved in DI water. Aluminum metal is used to reduce the copper ions to metallic copper, which is collected, dried and weighed. If the origanal sample has a mass 1.362g and the

  107. Chemistry

    If a sample of K3PO4 is found to contain 1.81 grams of K+ ions, how many PO3- 4 ions are present?

  108. Chemistry

    Consider the galvanic cell constructed from the following metals and their corresponding metal ions: E degrees (V) M^3+^ + 3e^-^ ----> M 0.29 N^2+^ + 2e^-^ ----> N 0.61

  110. Chemistry

    1. A student uses 6M HCl solution contaminated with Al(NO3)3 to wash the nichrome wire in between recordings of emission spectra for the different known and unknown metal ion solutions. The emission energies for the aluminum are 3.90x10^-19 J/atom,

  111. chem

    how do you know which halide salts confirms a presence of F- ions, Cl- ions, Br- ions, and I- ions?

  112. Chemistry

    There are _______ oxygen ions in 1 mole of Na2O. A. 6.0 x 10^23 O2 ions B. 1.2 x 10^24 O2 ions C. 3.0 x 10^23 ions D. None of these

  113. analytical chemistry

    Consider a general reaction where a ligand L and a metal ion Mn+ form a complex with m number of ligands (L) coordinated to each metal ions. Assume the metal is colorless. The ligand and metal solutions were mixed at molar fractions (and same total molar

  115. chemistry

    what is the Symbols and Names of Common Metal Ions with More than One Ionic Charge of CuSO4

  116. Chemistry

    How many (a) H+ ions and (b) OH" ions are present in 250 ml of a solution of pH3?

  117. Chemistry

    An unknown solution may contain one of the ions of the pair below. Devise a test which allows you to distinguish between the ions. Cu2+(aq) and Co2+ (aq)

  118. AP Chemistry

    A mixture of aluminum and zinc metal is used in 2 experiments described below: A- A 1.7 gram sample of the mixture is reacted with excess hydrochloric acid and the resulting hydrogen gas is collected over water. The reaction takes place at 750 mm Hg

  120. Chemistry

    silver ions in a solution of silver salts can be recovered by immersing copper metal in the solution. crystals of pure silver are deposited on the silver metal. design an experiment to determine the number of moles of silver atoms that form describe the

  121. Chemistry

    silver ions in a solution of silver salts can be recovered by immersing copper metal in the solution. crystals of pure silver are deposited on the silver metal. design an experiment to determine the number of moles of silver atoms that form describe the

  122. Chemistry(Please check)

    . The insoluble salts AV, B2W, C2X3, DY2, and EZ3, which were formed from the metal ions A+, B+, C3+, D2+, and E3+ and the nonmetal ions V1– , W2–, X2–, Y1–, and Z1–, all have the same Ksp value. The salt with the highest molar solubility is AV

  123. inorganic chermistry

    (a)explain why the colour for ions in the flame tests differ (b)Why do the chemicals have to be heated in the flame first before the colour light is emitted?

  125. Chemistry

    Consider two cells, the first with Al and Ag electrodes, and the second with Zn and Ni electrodes, each in appropriate 1.00M solutions of their ions. If 2.10g of metal is plated in the voltaic cell, how much metal is plated in the electrolytic cell?

Pages

  1. 1
  2. 2
  3. 3
  4. 4
  5. 5
  6. 6
  7. 7
  8. 8
  9. 9
  10. 10
  11. 11
  12. 12
  13. 13
  14. 14
  15. 15
  16. 16
  17. 17
  18. 18
  19. 19
  20. 20