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Introductory Chemistry - Access
- A 1.0-L solution that is 4.2 M in ammonia is mixed with 26.7 g of ammonium chloride. a What is the hydroxide-ion concentration of this solution? b 0.075 mol of MgCl2 is added to the above solution. Assume that there is no volume change. After Mg(OH)2 has precipitated, what is the molar concentration of magnesium ion? What percent of the Mg2+ is removed from solution?arrow_forwardA chemist mixes 1.00 L each of 0.100 M Na2CO3 and 0.200 M CaCl2 in a beaker. What is the concentration of carbonate ion, CO32, in the final solution?arrow_forwardHow would the solid Pb(OH)2 (came from KOH) solubility be affected when hydrochloric acid is added?arrow_forward
- Identify whether the following processes are run at constant volume and which are run at constant pressure. (a) an acid-base titration (b) decomposing CaCo3 by heating limestone in a crucible with a Bunsen burner (c) the reaction between zinc metal and an aqueous solution of Cu²+ ions to form copper metal and Zn²+ ions (d) measuring the calories in a 1-oz. serving of breakfast cereal by burning the cereal in a bomb calorimeterarrow_forwardIn the following equation, addition of Ca2+ ions will decrease the solubility of CaF2. CaF2 (s) Ca2+ + 2F-arrow_forwardIf the molar solubility of CaF2 at 35 Celsius is 1.24x 10-3 mol/L, what is ksp at this temperature?arrow_forward
- How many mL of H2O must be added to a 25.0 mL of NaCl to prepare 15% (v/v)arrow_forwardHeavy metal ions like lead (11) can be precipitated from laboratory by adding sodium sulfide, Na2S. Will all the lead be removed from 14.6mL of 7.40×10^-3M Pb(NO3)2 upon addition of 13.8mL of 0.0121M Na2S if all the lead is removed. How many moles of lead is this? If not, how many moles of Pb remain?arrow_forwardThe Ksp of zinc hydroxide, ZN(OH)2 is 3.00 x 10-17. Calculate the solubility of this compound in grams per liter.arrow_forward
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