Lab 6 Alka Seltzer Strength_Spring2024

Name Lab Partner Section # Date Pre-Lab Assignment: Stoichiometry Lab 1. In a lab experiment similar to the one you are going to do, a student slowly added hy- drochloric acid (HCI) to an evaporating dish containing magnesium carbonate MgCO3. a. Complete and balance the following equation for the reaction between magnesium carbonate and hydrochloric acid. MgCO3 (s) + HCl (aq) → (aq) + H₂CO3(aq) (When writing the formula for the missing product did you consider the charges of the ions?) b. When carbonic acid is formed in a chemical reaction, it is unstable and immedi- ately decomposes into carbon dioxide and water. Rewrite the equation above to show the final products using this information.

A. REACTIONS OF HYDROCARBONS Three hydrocarbon samples were analyzed by various qualitative tests and the summary of their reactions is given in Table 1 below. Identify each unknown sample by matching the respective reaction profile with the given structures (A, B, or C). Table 1. Summary of Reactions of Hydrocarbon Samples Sample Brz in CCI4 KMNO, in NaOH AGNO3 in NH3 Fading of reddish- brown color Brown precipitates 1 No reaction Fading of reddish- brown color Brown precipitates Silver precipitates 3 Fading of reddish- No reaction No reaction brown color H3C `CH3 H,C CH3 А Sample Identity and Rationalization 1

If this item does not open automatically you can open Data Sheet here = 106106334 Part I. Reaction of Fe³+ and SCN™ Test tube A B C 5 Adding NH3 (aq) 1/1 Action performed Experiment 15 Chemical Equilibrium and Le Châtelier's Principle Adding Fe(NO3)3 (aq) Adding NaSCN (aq) Adding NaNO3(aq) Part II. Reaction of Cu²+ and aqueous NH3 Action performed Mixing CuSO4 and NH3 (aq). Oll y 31 88% + Data Sheet Observations Observations. DELL العال[ O : * 8 CH127 Introductory General Chemistry Laboratory Conclusion Conclusion O Dec 18 8:09 2 3 Р

A. REACTIONS OF HYDROCARBONS Three hydrocarbon samples were analyzed by various qualitative tests and the summary of their reactions is given in Table 1 below. Identify each unknown sample by matching the respective reaction profile with the given structures (A, B, or C). Table 1. Summary of Reactions of Hydrocarbon Samples   Sample Br2 in CCl4 KMnO4 in NaOH AgNO3 in NH3 1 Fading of reddish-brown color Brown precipitates No reaction 2 Fading of reddish-brown color Brown precipitates Silver precipitates 3 Fading of reddish-brown color No reaction No reaction           Sample Identity and Rationalization 1           2             3

19. The chemical equation for photosynthesis is _CO2 (g) + _H₂O (1)→ __C6H1206 (s) + (C6H12O6 is glucose, the simplest sugar) a. Balance the chemical equation above by filling in the blanks. b. According to onetreeplanted.org, the average tree (across all climates and sizes) removes 10 kg of carbon dioxide from the atmosphere every year. Based on this, what mass of glucose is produced annually by the average tree? O2 (g) c. Teak is a common species of tropical tree. The graph below shows the amount of CO₂ absorbed by teak forests in tons of CO₂ per hectare of forest per year, according to the climate region where the forests are found (dry = low rainfall, humid=high rainfall). Looking at your photosynthesis equation again, what does this data suggest about which reactant is the limiting reactant for teak trees? Explain. C Teak Carbon sequestration rate (tons CO₂ ha -1yr -1) 10 10 20 Tropical humid Tropical dry Aboveground biomass, 0-20 years Belowground biomass, 0 -20 years

Balance the following chemical equation by placing a coefficient (including 1) in each answer box that is in front of each reactant and each product. While coefficients that are equal to 1 are not placed in front of either a reactant or product, you MUST include any coefficient that is equal to 1 in this problem. type your answer... C₂H12 + type your answer... 2 type your answer... CO₂ + type your answer... H₂O

IDENTIFYING SYNTHESIS REACTIONS GAOW Tên equations are listed below. Some are synthesis reactions, Some are not. Make a check (/) in the correct box next to each equation. Not a Equation Synthesis Reaction Synthesis Reaction 1. 2K + Br, – 2KB1 2. 2H,0 2H, + O, - 3. Nacl Na + Cl 4. 4Au + 30, 2Au,0, 5. 2Na + 2HCI → 2NACI + H, Cu + Br, CuBr, > 7. Zn + S ZnS 8. 2NA + Br, → 2NAB. 9. 2H8O 2Hg + O, > 10. 2Na + 1, 2Nal 6.

12. Name each chemical and complete the reaction ↑ Add file + H₂O

Given the combustion reaction below, how many moles of CO2 are formed given that you start with 1.50 x 10^-2 mol of C3H8O. (Assume O2 is in excess).  2 C3H8O + 9O2 ---> 6 CO2 + 8 H2O A. 3.00 x 10^-2 mol B. 4.50 x 10^-2 mol C. 5.00 x 10^-3 mol D. 7.50 x 10^-3 mol E. none of the above

Consider the reaction 3X + 2Y → 5C + 4D With excess Y, how many moles of X are needed to produce 13.00 moles of D?

Please answer all!!

Please write the correct observations for 20-24 only and then write the balanced chemical equations for 20-24 next

2 Fe + Oz →2 FeO 1. The chemical in the pink box is a... A. subscript B. coefficient C. reactant D. product 2. The number in the green box is a... A. subscript B. coefficient C. reactant D. product

Balance the reaction shown below:   H2CO3+NaOH→Na2CO3+H2OH2CO3+NaOH→Na2CO3+H2O  Once balanced, given 0.367 moles H2CO3H2CO3, calculate the grams of H2OH2O produced. A. 1.65 B. 38.3 C. 13.2 D. 61.8 E. 16.9

Balance the following reaction in your notes, assuming basic conditions (use the smallest whole number coefficients): Mn²+ (aq) + CIO (aq) → CIO₂(g) + MnO₂ (s) Then use the controls below to enter your equation and check your answer. Reactants Add Reactant Products Add Product Preview: Evaluate

Which of the following is always correct in considering the percentage yield of a reaction?     There are cases that percentage yield is greater than 100%. There are cases that percentage yield is greater than 100%. Theoretical yield is always greater than actual yield. Theoretical yield is always greater than actual yield. There is no relationship between actual and percent yield. There is no relationship between actual and percent yield. Percent yield is derived from pre and post lab experiments. Percent yield is derived from pre and post lab experiments. Actual yield is always greater than theoretical yield.    Which of the following is always correct in considering the percentage yield of a reaction?     There are cases that percentage yield is greater than 100%. There are cases that percentage yield is greater than 100%. Theoretical yield is always greater than actual yield. Theoretical yield is always greater than actual yield. There…

Predict he products and balance the chemical equation involving decomposition reaction. Have photo of your answers and attach it at the box below. Accepts pdf and jpg only. Use a darker pen. Decomposition Reaction 1. Fe,0, 2. Sodium chlorate 3. Magnesium carbonate 4. MgSO4, 7 H,0 5. NaHCO, Single Displacement Reaction 1. Na + Cas 2. Li + Bao| heat 3. Ва + H,0

Based on the process below, how many moles of electrons are transferred during the reaction? 3Pb(s) + 2Cr3+ (aq) = 3Pb²+ (aq) + 2Cr(s) n = [?] moles of e- moles of electrons Enter Copyright © 2003-2022 International Academy of Science. All Rights Reserved.

11a, 11c and 12c

Just do this questions on the worksheet!

Which set of coefficient will balance this equation??P+?Br2—>?PBr3A. 3,2,3 C. 2,6,2B. 3,1,1 D. 2,3,2

Please send me the question in 20 minutes it's very urgent plz

Using your reaction page, predicte the products and balance the reation. What type of reaction would the following be ID as? KCI(aq) + NaNO3(ag) →? Comb. #1 no reaction Comb. #4 Comb. #2 Double Replacement Decomp. #5 Single Replacement #1 Decomp. #2 Decomp. # 1 Single Replacement # 2 Total Combustion of a Hydrocarbon Comb. #3 Decomp. #4 Decomp. #3 hp C %23 %24 % & 3. 4 8 9. AU S d. m OO00 O O O O O O O O

Fe3+ + Cr2O72- → Fe2+ + Cr3+. Cr2O72- + ClO2- → Cr3+ + ClO2. Fe3+ + ClO2- → Fe2+ + ClO2. No reaction.

Paraffin wax vapor reacts with oxygen gas to form carbon dioxide gas and water vapor. Paraffin wax is a mixture of hydrocarbons having a general chemical formula of CnH2n+2 where n is at least 16. Assume that for this wax n=30 1. Write the symbolic form of this chemical reaction. 2. Classify this chemical reaction and write the general form of this type of reaction. 3. If the wax is a solid at room temperature, why does the reaction state that it is a gas? 4. Explain why the reaction stopped after the glass was placed over the candle. 5. Explain what was on the inside surface of the glass and where it came from.

How many moles of W are needed to react with 1.0 mol of Ho in the hypothetic chemical reaction? 3W + 2Ho  →  2W3Ho   a. 0   b. 1.5   c. 2   d. 3   e. 1

Balance the equations by inserting coefficients as needed

In Part G, is the reaction endothermic or exothermic? Explain based on the color change that resulted from heating the solution. Rewrite the chemical equation showing the heat as a reactant or product to depict your conclusion.

What type of chemical reaction?