This chemistry question involves key chemical concepts and calculations. The detailed solution below walks through each step, from identifying the reaction type to computing the final answer.
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Welcome back — missed you this week. 1. Test tube, beaker, funnel, Bunsen burner. 2. A suitable reagent for distinguishing aqueous solution of CO_3^2- and HCO_3^- is magnesium chloride (MgCl_2). 3. Titration is a common method of quantitative analysis used to determine the concentration of an unknown substance in a solution. 4. Three reasons why KMnO_4 is the most widely used oxidizing agent in redox titrations: • It is a strong oxidizing agent. • It is self-indicating (its intense purple color disappears at the endpoint, so no external indicator is usually needed). • It is relatively inexpensive. 5. Step 1: Identify the given values and the formula for heat change. Given: Change in temperature, T = 9.2 °C = 9.2 K Mass of solution, m = 120 grams = 0.120 kg Specific heat capacity, c = 4.2 JKg^-1K^-1 The formula for heat change ( H or q) is: H = mc T Step 2: Substitute the values into the formula. H = (0.120 kg) × (4.2 JKg^-1K^-1) × (9.2 K) Step 3: Calculate the result. H = 0.48 × 9.2 J H = 4.6368 J The change in enthalpy ( H) is 4.64 J. Send me the next one 📸