During your first day on the job as a research assistant, you are preparing 50 mL of hybridization solution with the following components and working concentrations: 50% formamide 5X sodium salt citrate 0.5% sodium dodecyl sulfate You start from the following concentrated stock solutions: 100% formamide 20X sodium salt citrate 20% sodium dodecyl sulfate How much of each concentrated stock solution and water will you add?

complete the flowchart

Chemistry Because the three possible unknowns (cinnamic acid, vanillin and 4- hydroxybenzaldehyde) have either carboxylic acid or phenol functional groups, they are all weak acids. • How will this weak acidity affect the freezing point depression? [Select] • What is the source of this affect? [Select] • How will the calculated molecular mass differ from the actual value? [Select] Because the three possible unknowns (cinnamic acid, vanillin and 4- hydroxybenzaldehyde) have either carboxylic acid or phenol functional groups, they are all weak acids. • How will this weak acidity affect the freezing point depression? [Select] [Select] The solution freezing point is lower than it should be. The solvent freezing point is higher than it should be. The solvent freezing point is lower than it should be. The solution freezing point is higher than it should be. value? [Select] n the actual

TRUE OR FALSE 1. Medicated elixirs are advantageous in adjusting the dose that may be increased or decreased by simply taking more or less of the elixir.  2. It is impossible to increase or decrease the amount taken of one ingredient without and automatic and corresponding adjustment in the dose taken of the other.  3. Then the alcoholic solution is added to the aqueous solution in order to maintain the highest possible alcoholic strength. 4. Saccharin is used for elixirs with low alcoholic content required only in small amounts. 5. Proportion of alcohol varies widely in elixirs since the individual components. 6. The final mixture of elixir will be clear since the separation of some of the flavoring oils by the reduced alcoholic concentration.  7. Permission of the oil globules oil to coalesce leads to difficulty in filtration. 8. Wetting the filter paper and collection flask using the solvent ensures continued solubility of the alcoholic ingredients.  9. Elixirs are best stored in…

You are given an 18% solution of sodium imidazole. What mass of imidazole (in g) would be in 20 mL of this solution?    a. You need to use the sodium imidazole stock solution from Q11 to make a dilute imidazole solution (final volume 180 mL) at      a final concentration of 0.2 M. The molecular weight of imidazole is 90 g/mole.    What volume of imidazole stock would you use (mL)?     b. You need to use the sodium imidazole stock solution from Q11 to make a dilute imidazole solution (final volume 180 mL) at a final concentration of 0.2 M. The molecular weight of imidazole is 90 g/mole.    What volume of water would you add (mL)?

A pharmacist has 50 mL of a 0.5% Gentian Violet solution, what will be the final ratio strength if he dilutes this solution to 1250 mL with purified water? 1:5000 1:500 1:1000 1:8

A mixture of ethanol, benzaldehyde and KMnO4 is mixed together. Would you expect a precipitate to form based on the reactants functional groups?

170.0 mL of 0.12 M C2 H5NH2 with 285.0 mL of 0.20 M C2 H5 NH3 Cl