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1.A solution may contain some of the soluble ions from group 1 but it does contain other cation or interferringsubstances. when 12 drops of 6 M Hydrochloric is added, no precipitate.
B. To a solution that is known to contain come of the soluble ions from group 1 and no other cations or inteferring substances, 12 drops of 6M hydrochloric acid is added and no precipoiate forms.To clear solution is evaporated to half its volume and 12 more drops of 6M hydrochloric acid is added followed by the addition of water until the solution's volume is 2mL. To this solution 1mLn of thioacetamide solution added and when the test tubeis heated, a dark brown precipitate forms?
A) wHAT CATION(S) ARE DEFINITELY IN THE UNKNOWN SOLUTION?
B) WHAT CATION(S) ARE DEFINITELY NOT IN THE UNKNOWN SOLUTION?
C) wHAT CATION(S) MAY BE IN THE UNKNOWN SOLUTION?
Calculate how many mL of 0.100 M NaOH are needed to neutralize completely 26.0 mL of 0.0300 M acetic acid. 2) Calculate how many mL of 0.100 M NaOH are needed to neutralize completely 36.0 mL of 0.0400 M H2SO4 (forming Na2SO4 and water)
Molecular weight and mole concept explained in this solution, The molecular weight of NaOH is 40. the molecular weight of a widely used buffer, HEPES, is 255
Cobalt was used as an internal standard to analyze a sample of titanium with atomic absorption spectroscopy. A mixture was prepared by combining a 4.50 mL Ti solution of unknown concentration with 2.00 mL of a 10.5 micrograms/mL solution of Co
the acidity of substituted benzenes and why it is so. Examples of molecules are p-nitrotoluene compared to m-nitrotoluene.
Draw a Lewis structure of BF that satisfies the octet rule for both atoms
Mass Absorbance Recrystallized sample .3040 g .070 concentration of salicyclic acid in the recrystallized aspirin sample solution =.000044 M
The gas mixture contains 2.5% sulfur dioxide (SO2) by weight. How many pounds of SO2 are released in one week? (Sig figs matter)
To treat a burn on your hand, you decide to place an ice cube on the burned skin. The mass of the ice cube is 12.9 g, and its initial temperature is -13.9 °C. The water resulting from the melted ice reaches the temperature of your skin,
What is the pH after 13.3 mL of base is added? The Ka of butanoic acid is 1.5 X 10^-5.
What pressure will the evolved carbon dioxide produce when 184.5g of calcium carbonate decomposes in a 20.00L container at 22.4 deg celsius?
what are the names of the quantity measured by each of seven SI base units and the SI symbols of the unit?
Calculate the partial pressure of ozone and the number of ozone molecules per liter of air if the temperature and pressure were 20.0 °C and 758 mmHg, respectively.
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