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- To determine , by gravimetric analysis, the concentration of barium ions (Ba2+) in a given solution, 25.00cm3 of it are pipetted into a beaker and an excess of dilute sulphuric acid is added to it. The precipitate then obtained (BaSO4) is filtered, dried and weighed. The mass of the precipitate is found to be 1.167g Calculate the concentration of barium ions in the solution? (only 2 decimal places). _________Mol/Lbalance the following unbalanced chemical equation showing the hydrolysis of water. use 1 for a coefficient of one even though typically no number is written _______ H2O --> _______ H2+ ______ O2After balancing the following chemical equation, what is the balancing coefficients of KClO3 and O2 respectivey ? KClO3 KCl + O2 The balancing coefficient of KClO3 is …………….. The balancing coefficients of O2 is ……………….. 16
- Balance the following reaction with the states of matter. __Cu(NO3)2(--) + __Na2CrO4(--) ------> __CuCrO4(--) + __NaNO3(--)Balance the equation below such that it has the smallest, whole-number coefficients. CH3CH2CH2CH2OH + O2(g) ® CO2(g) + H2O(g)The Bayer process is the formation of aluminum hydroxide from metallic aluminum and sodium hydroxide heated to high temperatures. Al(s)+ 3NaOH(aq) -->Al(OH)3(s) + 3Na A manufacturing chemist observes that two distinctly different solids are present in the solutions after the reaction has come to completion. The chemist collected the following data: data table From the above information, identify the limiting and excess reagent, the supporting evidence, and suggest a method to increase the amount of product produced.
- The concentration of arsenic in an insecticide can be determined gravimetrically through its precipitation as MgNH4AsO4. After the formation of the precipitate, it must be ignited for total conversion to Mg2As2O7, which is then cooled and weighed. Considering that a sample of 1,627 g of the insecticide produced 106.5 mg of Mg2As2O7, determine the% (m/m) As2O3 in the insecticide. Given the molar masses: Mg2As2O7 = 310.447 g / mol and As2O3 = 197.841 g / molBalance the following equation: Show your solution: ______Fe + O2 -----> _____Fe2O3Balance the following reactions _____ C6H6 + _____ O2 ---> _____ CO2 + _____ H2O
- For the following reaction: C3H8(g) + O2(g) ------> CO2(g) + H2O(g) Q: Balance the reaction:Balance the following equation. ___ M2CO3 (s) + ____ HCI(aq) --->___ CO2 (g) + ____ MCI (aq) +____ H2O(I) With the chemical equation above the following data was obtained: Mass of unknown + weighing boat - 2.87g Mass of weighing boat - 2.14g Volume of 1.0 M HCI used 19.11 mL What is the # of moles of HCI # of moles of unknown carbonate used The molar mass of unknown carbonate What is the identity of the unknown carbonate?Balance the reaction below in acid by selecting the correct coefficient for each component.Cr2O72− + HNO2 → Cr3+ + NO3-
