when zinc reacts with hydrochloric acid?
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The metal zinc readily reacts with hydrochloric acid to produce hydrogen gas (H2) and zinc chloride (ZnCl2). Every chemical reaction either produces or absorbs heat. In chemistry this effect is described as the reaction enthalpy. The zinc reaction produces the heat and hence has the negative enthalpy.
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Zinc does not react directly with water. The surface of the metallic zinc reacts with the oxygen of the air (O2) in presence of water (H2O), to form zinc hydroxide (Zn (OH) 2). Zinc hydroxide reacts with carbon dioxide (CO2) present in the air to form zinc hydroxycarbonate (2ZnCO3.
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Answer Expert Verified. Answer is: hydrogen ion concentration (H⁺) is greater in hydrochloric acid than a lemon with same concentration of both solutions. Strong acids (in this example hydrochloric acid) completely ionize in water and give large amount of hydrogen ions (H⁺): HCl(aq) → H⁺(aq) + Cl⁻(aq).
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Formula and structure: The chemical formula for hydrochloric acid is HCl, and its molecular weight is 36.47 g/mol. It is the solution of hydrogen chloride in water, and HCl is used synonymously for both the gaseous form and the aqueous solution.
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That is why copper(II) ions can act as an oxidizing agent when put into contact with zinc metal. ... However, no reaction will occur if a strip of copper metal is placed into a solution of zinc ions, because the zinc ions are not able to oxidize the copper. In other words, such a reaction is nonspontaneous.
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Chemical properties Zinc oxide is an amphoteric oxide. It is nearly insoluble in water, but it will dissolve in most acids, such as hydrochloric acid: ZnO + 2 HCl → ZnCl2 + H2O.
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Zinc metal is added to hydrochloric acid to generate hydrogen gas, which is collected over a liquid whose vapor pressure is the same as pure water at 20.0°C (18 torr). The volume of the gas mixture is 1.7 L and its total pressure is 0.810 atm.
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1 Answer. (a) When zinc granules are heated with sodium hydroxide solution, then sodium zincate salt and hydrogen gas are formed. (b) When bases react with non-metal oxides, then salt and water are formed. Example: Calcium hydroxide reacts with carbon dioxide to form calcium carbonate and water.
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Lucas' reagent is a solution of zinc chloride in concentrated hydrochloric acid, used to classify alcohols of low molecular weight. ... ZnCl2 forms a complex with oxygen of alcohol and converts the -OH to a much better leaving group thereby giving way to a rapid formation of chloroalkane.
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1 molecule of zncl2 contain one atom of zinc and two atom of chlorine bounded together by electrostatic force.
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Magnesium reacts with hydrochloric acid according to the equation: Mg(s) + 2 HCl(aq) --> MgCl 2(aq) + H 2(g) This demonstration can be used to illustrate the characteristic reaction of metals with acid, a single replacement reaction, or to demonstrate the generation of hydrogen gas.
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A ball of aluminum foil is added to an aqueous solution of copper(II) chloride, which causes an exothermic, single replacement, oxidation–reduction reaction to occur.
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In solution, it is acidic. Copper chloride is the result of the neutralization reaction between hydrochloric acid and copper hydroxide. With that in mind, it is the salt of a reaction between a strong acid and a weak base, making an aqueous solution of copper chloride slightly acidic.
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Explanation: Hydrochloric acid (HCl) does not form hydrogen bonding. This is because in hydrogen bonding the bonding is formed between hydrogen and elements Nitrogen, Oxygen and Flourine. In Hydrochloric acid (HCl) there are no elements like Nitrogen, Oxygen and Flourine so it cannot form hydrogen bonding.
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For exanple, sodium hydroxide reacts with zinc and water to form sodium zincate and hydrogen gas. Zn(s)+2NaOH(aq)+2H2O(l)→Na2Zn(OH)4(aq)+H2(g).
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Hydrochloric acid reacts with sodium hydroxide to form sodium chloride (the salt) and water. Sodium chloride is made up of Na+ cations from the base (NaOH) and Cl- anions from the acid (HCl). HCl+NaOH→H2O+NaCl.
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Ni-Cr-Mo alloys such as Hastelloy C do not react with dilute HCl. If the acid concentration goes beyond dilute and/or the temperature becomes high, then the HCl may react with the steel. Of course, the noble metals like gold do not react with HCl in any concentration.