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Titration of a 308.5 mg sample of synthesized aspirin with 0.100 M NaOH solution required 20.30 mL. What is the EMM(effective molar mass) of the sample, and what is the % ASA(acetylsalicylic acid)?
What is the minimum volume of water needed to recrystallize 50 mg of phthalic acid? How much phthalic acis will remain in solution after recrystallization?
Determine how much silver ion(Ag+) is left in solution if you mix 0.10 mole of silver nitrate AgNO3 with 0.20 mole of sodium hydroxide NaOH to make a one litre solution.
Considering the two sides as a H2O/H+/O2 cell with a pH inside the cell of 7.23 and outside the cell of 7.12, determine the absolute value of the electromotive force difference between the two sides of the cell membrane.
A current of 0.0100 A is passed through a solution of rhodium sulfate, causing reduction of the metal ion to the metal. After 3.00 h, 0.038 g of Rh has been deposited. What is the charge on the rhodium ion, Rhn+? What is the formula for rhodium su..
Assume air in tank is mixed and that air is an ideal diatomic gas. For a heated tank what heat rate must be applied to keep the tank air temperature constant? For a perfectly insulated tank, what is the tank air temperature after 100 seconds? The ..
The dissociation of solid silver chloride in water to produce silver ions and chloride ions has an equilibrium constant of 1.8 x10-18. Based on the magnitude of the equilibrium constant, is silver chloride very soluble in water? Explain your answe..
A sample of zinc nitride, Zn3N2, contains 39.0 g of zinc. How many nitride ions are present
Oxalic acid (H2C2O4) is a useful primary standard for standardizing solutions such as potassium permanganate (KMnO4). In a particular standardization experiment 29.00g of oxalic acid, is titrated with 243.00mL of permangante solution
how do you calculate the number of equivalents of NaOH required to reach the equivalence point?
A 500.0 g sample of aluminium is initially at 25.0 °C. It absorbs 32.60 kJ of heat from its surroundings. What is its final temperature, in °C? (specific heat = 0.9930 J g-1 K-1 for aluminum)
The temperature of a sample of water increases by 6.5 degrees Celsius when 8.5 kilo Joules are applied. The specific heat of liquid water is 4.18 Joules per gram x degrees Celcius. What is the mass of the sample of water?
a student was asked to identify an unknown hydrate by following the procedure described in this module. after heating
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