The mass percent of Al ( OH ) 3 in the 0.4826 g mixture of Al ( OH ) 3 and Mg ( OH ) 2 that is neutralized with 17.30 mL of 1.000 M HNO 3 is to be calculated. Concept introduction: Strong acids and strong bases are the substance that dissociates completely into its ions when dissolved in the solution. They dissociate completely in water to release H + ions and OH − ions. Weak acids and weak bases are the substance that does not dissociate completely into its ions when dissolved in the solution. They dissociate partially in water to release H + ions and OH − ions. Neutralization reaction involves the reaction of acid and base in stoichiometric amount that is equal mole of H + ions and OH − ions reacts to form the product.
The mass percent of Al ( OH ) 3 in the 0.4826 g mixture of Al ( OH ) 3 and Mg ( OH ) 2 that is neutralized with 17.30 mL of 1.000 M HNO 3 is to be calculated. Concept introduction: Strong acids and strong bases are the substance that dissociates completely into its ions when dissolved in the solution. They dissociate completely in water to release H + ions and OH − ions. Weak acids and weak bases are the substance that does not dissociate completely into its ions when dissolved in the solution. They dissociate partially in water to release H + ions and OH − ions. Neutralization reaction involves the reaction of acid and base in stoichiometric amount that is equal mole of H + ions and OH − ions reacts to form the product.
The mass percent of Al(OH)3 in the 0.4826 g mixture of Al(OH)3 and Mg(OH)2 that is neutralized with 17.30 mL of 1.000M HNO3 is to be calculated.
Concept introduction:
Strong acids and strong bases are the substance that dissociates completely into its ions when dissolved in the solution. They dissociate completely in water to release H+ ions and OH− ions.
Weak acids and weak bases are the substance that does not dissociate completely into its ions when dissolved in the solution. They dissociate partially in water to release H+ ions and OH− ions.
Neutralization reaction involves the reaction of acid and base in stoichiometric amount that is equal mole of H+ ions and OH− ions reacts to form the product.
There is an instrument in Johnson 334 that measures total-reflectance x-ray fluorescence (TXRF) to do elemental analysis (i.e., determine what elements are present in a sample). A researcher is preparing a to measure calcium content in a series of well water samples by TXRF with an internal standard of vanadium (atomic symbol: V). She has prepared a series of standard solutions to ensure a linear instrument response over the expected Ca concentration range of 40-80 ppm. The concentrations of Ca and V (ppm) and the instrument response (peak area, arbitrary units) are shown below. Also included is a sample spectrum. Equation 1 describes the response factor, K, relating the analyte signal (SA) and the standard signal (SIS) to their respective concentrations (CA and CIS).
Ca, ppm
V, ppm
SCa, arb. units
SV, arb. units
20.0
10.0
14375.11
14261.02
40.0
10.0
36182.15
17997.10
60.0
10.0
39275.74
12988.01
80.0
10.0
57530.75
14268.54
100.0…
A mixture of 0.568 M H₂O, 0.438 M Cl₂O, and 0.710 M HClO are enclosed in a vessel at 25 °C.
H₂O(g) + C₁₂O(g) = 2 HOCl(g)
K = 0.0900 at 25°C
с
Calculate the equilibrium concentrations of each gas at 25 °C.
[H₂O]=
[C₁₂O]=
[HOCI]=
M
Σ
M
What units (if any) does the response factor (K) have? Does the response factor (K) depend upon how the concentration is expressed (e.g. molarity, ppm, ppb, etc.)?
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