1. Molecular : Pb(NO,)»(aq) + KI(aq) KNO:(aq) + PbI;(s) Detailed ionic Net ionic 2. Molecular : (NH.),PO,(ag) + CaCO,(s) → Ca,(PO.).() + (NH.),CO,(aq) Detailed ionic Net ionic
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- A monoatomic anion with two charges contains 36 electrons. It is statements is false? A. Kr B. Ca2+ C. Sr2+ D. O2- E. Se2- choose all that apply 1b. Consider the reaction, 2 Al + 3 Cu2+ → 2 Al3+ + 3 Cu. The oxidizing agent is, Al Cu2+ Al3+ Cu H2O in which this reaction takes place. 1c. Which of these formulas is(are) not valid for hexane? A. C6H14 B. C6H6C. C6H16D. CH3CH2CH2CH2CH2CH3 E. CH3(CH2)4CH3Cocaine (C17H21O4N) is a natural substance found in the leaves of the coca plant, which has been used for centuries as a local anesthetic and stimulant. Illegal cocaine arrives in the USA either as a pure compound or as the hydrochloride salt (C17H21O4NHCl). At 25oC, the salt is very soluble in water (2.50 kg/L), but pure cocaine is much less so (1.70 g/L). What is the maximum amount of salt (in gram) that can dissolve in 50.0 mL of water? [1 mark.] When a 25 mL aqueous solution that contains 62.50 g of the salt is treated with NaOH, the salt is converted to pure cocaine. How much water (in liters) is needed additionally to dissolve the formed pure cocaine? Round your final answer off to two decimal points. C17H21O4NHCl(aq) + NaOH(aq) → C17H21O4N(aq) + H2O(l) + NaCl(aq)Br2(at)+2NaI(aq) --> 2NaBr(aq)+I2(aq) Cl2(aq)+2NaBr(aq) --> NaCl(aq)+Br2 Will a reaction occur between elemental chlorine (Cl2) and potassium iodide? what about between bromine (Br2) and lithium chloride?
- Hard water contains Ca2+, Mg2+, and Fe2+, which interferewith the action of soap and leave an insoluble coating onthe insides of containers and pipes when heated. Water softenersreplace these ions with Na+. Keep in mind that chargebalance must be maintained. (a) If 1500 L of hard water contains0.020 M Ca2+ and 0.0040 M Mg2+, how many moles ofNa+ are needed to replace these ions? (b) If the sodium isadded to the water softener in the form of NaCl, how manygrams of sodium chloride are needed?Zn + NO3¯ ---> Zn(OH)42¯ + NH3Cocaine (C₁₇H₂₁O₄N) is a natural substance found in cocaleaves, which have been used for centuries as a local anestheticand stimulant. Illegal cocaine arrives in the United States eitheras the pure compound or as the hydrochloride salt(C₁₇H₂₁O₄NHCl). At 25C, the salt is very soluble in water(2.50 kg/L), but cocaine is much less so (1.70 g/L). (a) Whatis the maximum amount (in g) of the salt that can dissolve in50.0 mL of water? (b) If the solution in part (a) is treated withNaOH, the salt is converted to cocaine. How much additionalwater (in L) is needed to dissolve it?
- Group A: solution conductivity (MS) NaCl 6594 CaCl2 13188 AlCl3 16311 Group B: solution conductivity (MS) HCl 21809 Hc2H3O2 639 H3PO4 8805 For H3PO4, does the subscript "3" of hydrogen in this formula seem to result in additional ions insolution as it did for AlCl3in Group A? Explain.4.49 Nitric acid is a strong oxidizing agent. State which ofthe following species is least likely to be produced whennitric acid reacts with a strong reducing agent such aszinc metal, and explain why:Formaldehyde (CH2O, MM = 30.03) has a multitude of uses includingtissue preservation. Formalin is a commercially available solution offormaldehyde and has a concentration of 19.6 m formaldehyde anda density of 1.09 g/cm3. What is the molarity of formaldehyde inthe solution?
- Give a clear handwritten answer...complete the following reaction with ionic and net ionic....Magnesium reacts with hydrochloric acid to produce hydrogen gas.ΔH°f for HCl(aq) = –167.16 kJ/molΔH°f for MgCl2(aq) = –801.17 kJ/mol (iv) What type of reaction is this?(v) In our everyday lives, we observe what happens around us using five biologicalsenses. Give the names of the biological senses.(vi) If you reacted magnesium with hydrochloric acid in the laboratory, specifically whatwould you observe? Give four observations.Give both typed explanation not a single word of hand written.otherwisr leave it