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“Warm-up” ~ 06-01-09

“Warm-up” ~ 06-01-09. How many moles of HCl are in 15mL of 0.20 M HCl ?. How many moles of HCl are in 15mL of 0.20 M HCl ?. 15mL HCl x 1L/1000mL = 0.015L HCl. 0.015L HCl x 0.20 M HCl = 0.003 mol HCl. “Today  ~ 06-01-09. Some Notes on Lab Calculations Homework Review

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“Warm-up” ~ 06-01-09

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  1. “Warm-up” ~ 06-01-09 How many moles of HCl are in 15mL of 0.20 MHCl?

  2. How many moles of HCl are in 15mL of 0.20 MHCl? 15mL HClx 1L/1000mL = 0.015L HCl 0.015L HClx 0.20 MHCl = 0.003 mol HCl

  3. “Today  ~ 06-01-09 Some Notes on Lab Calculations Homework Review Test Review Quiz Review Finish Lab Journal

  4. Lab Calculations: You need to calculate how much HCl is neutralized by your antacid sample 0.10g Antacid mL of NaOH added 15mL of HCl added

  5. Lab Calculations: How many moles of HCl can be neutralized by 1.0 mole of NaOH? HCl(aq) + NaOH(aq)  H2O(l) + Na+(aq) + Cl-(aq) One mole of HCl can be neutralized by 1.0 mole of NaOH.

  6. Lab Calculations: Step 4 Step 2 Step 3 0.10g Antacid mL of NaOH added 15mL of HCl added Step 1

  7. Data and Observations: Draw your data table and calculation table and leave lots of room to show your calculations and your results/calculations table. • Determine calculation table headers for each needed calculation: • Moles of NaOH added = moles of HCl left (unneutralized) • Moles HCl neutralized = initial moles HCl - Moles NaOH used • Moles HCl neutralized ÷ Antacid sample mass • Averages for each antacid

  8. Calculations: Your calculated results are shown in the calculation table. Below this, you must show a labeled example calculation for each of your individual calculations along with all of these calculations. Pre-lab Questions: Complete the pre-lab questions and include in the lab journal

  9. Conclusion: Restate the purpose and clearly state your results. Refer specifically to your data. Error Analysis: Be sure to state the result error has on your final calculations for any error you describe.

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