12 meq of NaOH were required to reach end point. Be sure to include the states of all compounds in your equations (solid, liquid, aqueous, or gas). What is the general equation of a double displacement reaction? # $ % & ' �������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������� ` �� � bjbj�� c �� �� 5_ x �� �� �� � � � � � � � � � T � � � @ \� � �� \ T � l H� H� : �� �� �� �� �� �� � � � � � � � $ h o � A � A� �� �� A� A� � � �� �� U /� /� /� A� | � �� � �� � /� A� � /� /� � �� � � � b� ��. The balanced equation for the reaction is 3O2 1g2 ¡ 2O3 1g2 To calculate the moles of O3 produced, we must use the appropriate mole ratio: 0.50 mol O2 lh h C b di b k i h h i d i i 2 mol O3 0.33 mol O3 3 mol O2 Avogadro’s law states that V an, which can be rearranged to give N2 H2 \[\ce{Pb(NO3)2 (aq) + 2 KCl (aq) -> 2 KNO3 (aq) + PbCl2 (s)}\]. Note that if both of the predicted products are soluble, a precipitation reaction will not occur. Then write a balanced equation for each reaction. Tell the type of reaction. An excess of NaOH … If the word equation is complete, write and balance the chemical equation. To balance a chemical equation, enter an equation of a chemical reaction and press the Balance button. If you predict that no reaction will occur, write “NR”, followed by a brief explanation. Both carbonic acid and sulfurous acid are unstable and will decompose to form carbon dioxide and sulfur dioxide gases, respectively: The predicted products are sulfurous acid and sodium nitrate. What are three observable signs that a chemical reaction has occurred? (2015) (a) 8 : 16 : 1 (c) 16 : 1 : 2 When finished, complete your lab report by writing the balanced equations for each reaction studied. This solid product is an insoluble ionic compound called a precipitate. Balance the equation (to ensure mass conservation). The predicted products are water and lithium sulfate. Write the correct formulas for each reactant and place a yield arrow (→) after the last reactant. A precipitate (cloudy, tiny particles) appears. The balanced equation below represents the reaction of glucose, C6H12O6, with oxygen at 298 K and 101.3 kPa. If the word equation is incomplete, complete it and write the balanced chemical equation. Old substances are converted to new substances, which have unique physical and chemical properties of their own. Aqueous potassium chloride + aqueous silver nitrate, 9. The LibreTexts libraries are Powered by MindTouch® and are supported by the Department of Education Open Textbook Pilot Project, the UC Davis Office of the Provost, the UC Davis Library, the California State University Affordable Learning Solutions Program, and Merlot. Note that some reactions take longer than others. Be especially cautious when using the 6 M \(\ce{HCl}\) and 6 M \(\ce{NaOH}\) as they can burn your skin. b. is the reactant for which you have the fewest number of moles. Zinc metal + aqueous lead(II) nitrate, 12. 5.0 Approximately what mass of CuSO4•5H2O (250 g mol-1) is required to prepare 250 mL of 0.10 M copper(II) sulfate solution? Always use clean test tubes that have been rinsed with distilled water. Adopted a LibreTexts for your class? magnesium metal + aqueous aluminum chloride, Since \(\ce{Mg}\) is more active than \(\ce{Al}\), a single displacement reaction will occur. To balance a chemical equation, enter an equation of a chemical reaction and press the Balance button. Also be aware that skin discoloration will result from contact with \(\ce{AgNO3}\). For each of the following sets of reactants, write the balanced equation for the single displacement reaction that occurs. NH4+ is the conjugate acid to the base NH3, because NH3 gained a hydrogen ion to form NH4+.The conjugate base of an acid is formed when the acid donates a proton. 2H2O2 2H2O + O2. ��ࡱ� > �� ( * ���� ! " Consider Reactions 3 and 14 studied in this lab. Aqueous iron(III) chloride + aqueous ammonium hydroxide, Reaction 3: Aqueous sodium phosphate + aqueous copper(II) sulfate, Reaction 14: Aqueous iron(III) chloride + aqueous ammonium hydroxide. Alkali metal compounds, acetates, nitrates, and ammonium compounds are all, Hydroxides of alkali metals and \(\ce{NH4^{+1}}\), \(\ce{Ca^{+2}}\), \(\ce{Sr^{+2}}\), and \(\ce{Ba^{+2}}\) are, Most phosphates, carbonates, chromates and sulfides are, Aqueous barium chloride + aqueous sodium sulfate, Aqueous sodium phosphate + aqueous copper(II) sulfate, Aqueous nickel(II) nitrate + aqueous sodium hydroxide, Aqueous potassium chloride + aqueous silver nitrate, Hydrochloric acid + aqueous sodium hydroxide, Aqueous sodium carbonate + aqueous cobalt(II) nitrate, Aqueous sodium chloride + aqueous potassium nitrate, Aqueous iron(III) chloride + aqueous ammonium hydroxide. If you determine that a reaction will occur, write the correct formula(s) of the products after the arrow. What is the general equation of a single displacement reaction? aqueous lead(II) nitrate + aqueous potassium chloride. For each of the following sets of reactants, write the balanced equation for the double displacement reaction that occurs. The limiting reactant in a reaction: a. has the lowest coefficient in a balanced equation. However, one of the products could also be carbonic acid (\(\ce{H2CO3}\)) or sulfurous acid (\(\ce{H2SO3}\)). Some of the observable signs that a chemical reaction has occurred include the following: Note that there are many other observable signs for chemical reactions, but these are the ones most likely to be encountered in this lab. 4.24. Give reason(s) for the product(s) 1. barium chloride + sodium sulfate → 2. calcium + hydrochloric acid → 3. Write the balanced molecular equation (identical to what you completed in the previous section), the complete ionic equation and the net ionic equation for these reactions. The equipment required for this lab is fairly simple - just 8 small test tubes and 6 large test tubes. A good estimate is to use two full dropper squirts of each chemical. C6H12O6(s) + 6O2(g) → 6CO2(g) + 6H2O(l) 51 Determine the mass of CO2 produced when 9.0 grams of glucose completely reacts with 9.6 grams of oxygen to produce 5.4 grams of water. Aqueous zinc chloride + aqueous sodium chromate, Aqueous lithium hydroxide + phosphoric acid. Use uppercase for the first character in the element and lowercase for the second character. Legal. The predicted products are aluminum metal and aqueous magnesium chloride, \[\ce{3 Mg (s) + 2 AlCl3 (aq) -> 2 Al (s) + 3 MgCl2 (aq)}\]. In the reactions involving both a solid and a solution as reactants, which do you place in the test tube first? If Avogadro number N A , is changed from 6.022 × 1023 mol 1 to 6.022 × 10 20 mol 1, this would change (a) the mass of one mole of carbon (b) the ratio of chemical species to each other in a balanced equation (c) the ratio of elements to each other in a compound (d) the definition of mass in units of grams. Use uppercase for the first character in the element and lowercase for the second character. For reactions involving solutions only, use small test tubes. Aqueous barium chloride + aqueous sodium sulfate. To identify the products formed in each of these reactions. Click here to let us know! Solutions: 6 M sodium hydroxide, 6 M hydrochloric acid, 6 M ammonium hydroxide, 5% acetic acid; all other solutions are 0.1 M and include silver nitrate, barium chloride, sodium sulfate, potassium chloride, lead(II) nitrate, iron(III) chloride, sodium carbonate, cobalt(II) nitrate, sodium phosphate, zinc nitrate, copper(II) sulfate, sodium chloride, potassium nitrate, nickel(II) nitrate. \[\ce{H2SO4 (aq) + 2 LiOH (aq) -> Li2SO4 (aq) + 2 H2O (l)}\]. To balance it, we must place the coefficient 5 on the left of oxygen on the left side of the equation to balance the oxygen atoms appearing on the right side of the equation. Aluminum metal + aqueous nickel(II) nitrate. As a rule, if A has a higher activity that \(B\), a single displacement reaction will occur. sulfuric acid + aqueous lithium hydroxide. However, if \(A\) has lower activity than \(B\), a single displacement reaction will not occur. The ash was dissolved in 60meq HCl and the resulting solution was back titrated with NaOH. Perform the following reactions and record your observations for each on the report form.