Question

3 For each of the following scenarios, determine if the error will cause the molarity of the hydrochlorie acid to be greater than, less than, or the same as the initial value. A student accidentally adds three extra drops of the NaOH to the reaction flask with KHP during the standardization titration. b. A student adds 50 mL of water to the reaction flask with the unknown hydrochloric acid instead of the 25 ml, stated in the procedure. e. A student doesn't notice that some of the HC has dripped out from the volumetrie pipet when transferring to the reaction flask. 1. What do you suppose was the greatest source of error for you and your partner in this experi- ment? Explain.

Answer 1

I Manon MV, Nhach I MNach x V Naon = 1 Muci XV HCl Thus, if we will add extra Nach during tetration with KHP, molarity of Nach will come down because of that Hcl molarity will also Derease! b) More water has been added that means solution has been diluted. .: Molarity of HCI will DECREASE. c) Some HCl has fellen into slab that means HCl volume decreases. TMKC = MV Vhil i molarity of Hel will increased due to loss of HCl. NaoH