Word Equations Answer Key 1. 2H 2 O, GSH, and sodium sulfide (n S /n Zn = 1, and n GSH /n Zn was set as 0, 1.5, 3, 4.5, 6) was dissolved in 2 mL … Al 2 (SO 4) 3 + BaCl 2 BaSO 4 + AlCl 3 Double Replacement 6. CISCE ICSE Class 7. (iii) Arrange the metals A, B, C and D in order of increasing reactivity. Why? Zinc and sulfur react to form zinc sulfide according to the equation Zn+S=>ZnS a) How many grams of ZnS will be formed? Write the balanced chemical equations for the following word equations The reaction of zinc with aqueous sulfuric acid produces zinc sulfate and hydrogen gas Zn2 + 4 H2SO4 = 2 Zn(SO4)2 + 4 H2 The balanced equation will appear above. The atomic weight of zinc is 65.37 and so if we start with 25 grams, that is 25/65.37, or 0.3824 mole of zinc. Share 1. To balance a chemical equation, enter an equation of a chemical reaction and press the Balance button. Zn + S → ZnS. 1 : 1 mol ratio so the same moles of Sulfur are required and we can convert this into mass because. (iv) Which one among A, B, C and D metals can be used to make containers that can be used to store any of the above solutions safely? Zn + Pb(NO 3) 2 Zn(NO 3) 2 + Pb Single Replacement 2. C 12 H 22 O 11 + O 2 CO 2 + H 2 O Combustion 9. Zn + S rarr ZnS Do I win 5 lbs? C. zinc chlorate and water. I can imagine the original reaction looking something like this: CuSO4(aq) + ZnSO4(aq) + 2Na2S(aq) → CuS(s) + ZnS(s) + 2Na2SO4(aq) Full ionic equation: Question Bank Solutions 6585. Zinc sulfide (or zinc sulphide) is an inorganic compound with the chemical formula of ZnS. Syllabus. so find moles of Zn by dividing Mass/ Molar mass. If you made a purchase, and presented the cashier with a large denomination banknote, the value of your purchase + the value of your change MUST equal the value of the banknote. 2. Balancing chemical equations. The theoretical electromotive force is +2.36v + 0.76v = +1.6v, meaning if the the two metals were used in a galvanic cell, the cell would theoretically be able to achieve a total of 1.6 volts. The reaction of elemental zinc with arsenic acid in acidic solution yields arsine AsH 3 a highly toxic and unstable gas and Zn 2 aq . To balance a chemical equation, enter an equation of a chemical reaction and press the Balance button. Zinc and sulfur react to form zinc sulfide according to the equation. Given The Equation Below, Identify: 2* (a) Zn(s) + S(s) → ZnS(s) The Reactant That Is Reduced: The Reducing Agent: The Oxidizing Agent: This problem has been solved! The effect of shell growth time, Zn/AgIn and TU/Zn ratios on the fluorescence performance of QDs were systematically investigated and the emissive mechanism was analyzed by the PL decay curves. 1 ; View Full Answer About Us; This reaction takes place at a temperature near 60°C in the water. write the half reactions and the net equation a) zinc is an active metal that oxidizes quickly when exposed to air and water ok so heres what i have to far Zn = Zn2+ + 2 e- Zn + H2O = ZnO + 2H+ + 2e but i dont think its right EXAMPLE Zinc and sulfur react to form zinc sulfide, a substance used in phosphors that coat the inner surfaces of TV picture tubes. Zinc and Lead (II) nitrate react to form Zinc Nitrate and Lead. phase symbols. Chemical reaction. This equation already appears in net ionic equation format , and as such there are no spectator ions. Zn b) How many grams of ZnS will be formed? Zn + S -----> ZnS Zn=0.3803 mol S=0.9356 mol If 25.0 g of zinc and 30.0 g of sulphur are mixed, a) Which chemical is the limiting reactant? c) How many grams of the excess reactant will remain after the reaction is over? Log in: Chemical reactions Сhemical tables. Examples: Fe, Au, Co, Br, C, O, N, F. Ionic charges are not yet supported and will be ignored. We see that 1 atom of zinc produces 1 molecule of ZnS, so each mole of zinc. D. zinc and hydrogen carbonate. This is the main form of zinc found in nature, where it mainly occurs as the mineral sphalerite.Although this mineral is usually black because of various impurities, the pure material is … Use uppercase for the first character in the element and lowercase for the second character. what is the word equation for zn + cuso4 =znso4 + CU - 16494978 Zinc and sulphur react to form zinc sulphide according to the equation. Dear Student, The reaction is: 2 Zn + O 2 = 2 ZnO So, the word equation is: Zinc + oxygen = Zinc oxide Regards. Textbook Solutions 6493. Net ionic equation: Mg(s) +Zn2+(s) --> Mg2+(s) + Zn(s) Here zinc's oxidation state is reduced from 2+ to 0 and Mg is oxidized from 0 to 2+. Home Reactions Blog. A product is a substance that is present at the end of a chemical reaction. Concept Notes & Videos & Videos 103. There are two changes that can be observed when we mix substances together and this is either physical or chemical changes. 2) When isopropanol (C 3 H 8 O) burns in oxygen, carbon dioxide, water, and heat are produced. B. zinc chloride and hydrogen. Test out your understanding of chemical reactions by taking up the quiz below. A reactant is a substance that is present at the start of a chemical reaction. Share with your friends. Write the word equation for the reaction. Answer to: Balance the equation: Zn(s) + H2SO4(aq) → ZnSO4(aq) + H2(g) Express your answer as a chemical equation. Al (s) + HCl (g) → AlCl 3(s) + H 2(g) 3. Zn (s) + S (s) → ZnS (s) 2. The balanced equation for the reaction is: Zn + S → ZnS. The substance(s) to the left of the arrow in a chemical equation are called reactants. Answer the following based on the above information : (i) Which is the most reactive metal? Use uppercase for the first character in the element and lowercase for the second character. Check that the atoms are in fact balanced. When zinc metal and sulfur powder are heated, they form solid zinc sulfide. The balanced equation will appear above. b) How many grams of ZnS will be formed? Worked example 1: Balancing chemical equations 1 The equation for the reaction is Zn + S-----> ZnS In a particular experiment 12.0 g of Zn are mixed with 6.50 g S and allowed to react. 4. The Equation for the reaction is : Zn + S = ZnS, but I am not sure as the mixture is heated in presence of oxygen. produces 1 mole of ZnS if there is enough sulfur so all the zinc reacts. See the answer If you know Zn is the limiting reagent then you must have moles Zn calculated as about 0.38. 1 mol : 1 mol ratio b/w Zn and Sulfur. What mass of zinc sulfide can be produced from the reaction of 130.8 g of zinc reacting with 256.6 g of sulfur? In chemistry, a word equation is a chemical reaction expressed in words rather than chemical formulas.A word equation should state the reactants (starting materials), products (ending materials), and direction of the reaction in a form that could be used to write a chemical equation. (we will look at this a little later): Add any extra details to the equation e.g. Examples: Fe, Au, Co, Br, C, O, N, F. Ionic charges are not yet supported and will be ignored. Zn + S -----> ZnS If 25.0 g of zinc and 30.0 g of sulfur are mixed, a) Which chemical is the limiting reactant? 25 g/ 65.409 g/mol = 0.3822104 moles. The equation for the reaction is: Zn(s) + 2HCl(aq) ---> H2(g) + ZnCl2(aq) A piece of zinc is dropped into 1.00 L of 0.100 M HCl and the following data were obtained: Chemistry. Given the equation: #8Zn +S_8 -> 8ZnS#, if 7.36 g of zinc react with 6.45 g of sulfur, which is the limiting reactant and what mass of zinc sulfide forms? Advertisement Remove all ads. Zn + S ZnS Synthesis 5. Aluminum metal plus hydrogen chloride gas yields solid aluminum chloride plus hydrogen gas. Aluminum Bromide and Chlorine gas react to form Aluminum Chloride and Bromine gas. Mg(OH) 2 + H 2 SO 4 MgSO 4 + H 2 … A chemical reaction involves the rearrangement of the molecular structure of a substance. Language: ru es en. Zn + I 2 ZnI 2 [ Check the balance ] Zinc react with iodine to produce zinc iodide. (ii) What would be observed, if ' B ' is added to a solution of Copper (II) sulphate and why? If the equation is not balanced, change the coefficients of the molecules until the number of atoms of each element on either side of the equation balance. To do that you use the coefficients in the balanced equation like this. There are three main steps for writing the net ionic equation for Zn + CuSO4 = ZnSO4 + Cu (Zinc + Copper (II) sulfate). 0.38 mol Zn x (1 mol ZnS/1 mol Zn) = 0.38 mol Zn x 1/1 so 0.38 mols Zn = 0.38 mol ZnS. 2AlBr 3 + 3 Cl 2 2AlCl 3 + 3Br 2 Single Replacement 3. H 2 SO 4 + Fe H 2 + FeSO 4 Single Replacement 8. Balance the equation for this reaction using oxidation states: H 3 AsO 4 aq Zn s AsH 3 g Zn 2 aq Given: reactants and products in acidic solution. + Pb Single Replacement 8 2 ( g ) → AlCl 3 ( s ) to the equation e.g there!: ( I ) Which is the most reactive metal ZnS, so each mole of produces. †’ AlCl 3 ( s ) to the equation e.g reagent then you have. Back for more quizzes like these to aid in your revision Replacement 3: 1:! 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