The structures of each of the dyes used in this experiment are shown below. Based on your observations, make a note which dyes reacted with acid or base. If a dye reacted with acid or base, draw the acid-base reaction product. NH Но. LOH HN NH 0 Sudan Blue Sudan Orange Nile Blue Organic molecules are typically separated and isolated via the organic layer in an extraction because the solvent is easier to remove by evaporation via a rotary evaporator (you will use this soon!) If you separated a mixture of compounds using hexanes and aqueous HCI, and then separated the two phases, describe how you could re-partition (transfer) the compound from the acidic phase into the organic phase.

QI. Consider a spring mass system given in Fig 1 with mass of 1kg attached to a spring with K=10. The motion is damped with C=6 and is being driven by a force given by 25 cos 4t . If the spring is released from rest, find the equation of displacement y(t). Note: You cannot use the direct formulas for constants in particular solution. Spring Mass r(t) Dashpot Fig. 1