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When 25 ml of 1 M H2SO4 is added to 50ml of 1 M NaOH at 25 C in a calorimeter, the temp of the aqueous solution increases to 33.9 C. Assuming the specific heat os the solution is 4.18 (J/gC), that its density is 1 g/ml, and that the calorimeter itself absorbs a negligibkle ammount of heat, calculate delta H in kJ for the rxn:
H2SO4 (aq) + 2NaOH(s) -> 2H2O (l) + Na2SO4 (aq)
A 25.0-mL sample of 0.35 M HCOOH is titrated with 0.20 M KOH. What is the pH of the solution after 25.0 mL of KOH has been added to the acid? Ka = 1.77 × 10-4
The density of magnesium oxide is 3.58 g /cm3. Given that the radius of the O2- ion is about 140 pm in most oxides, calculate the radius of Mg2+, in pm. Your solution should include a sketch one face of the unit cell of MgO to show how the edge le..
Phosphorus is combined with chlorine to give PClz a gaseous compound .calculate the value of z If you start with 2.097g of P and isolate 9.298g of PCLz .
a specimen of iron ore weighing 0.500g was dissolved in dilute sulphuric acid. the solution was titrated with 0.0200m
Magnesium oxide (MgO) forms when the metal burns in air. (a) If 1.25 g of MgO contains 0.754 g of Mg, what is the mass ratio of magnesium to oxide
Write the structure of the product obtained when cyclohexane is used to decolorize bromine-containing solutions
During the reaction A+B to C, reagant B was held in excess at a concentration of 0.150 M. The order of B was 1. Next, by plotting collected data as ln [A] vs. time, a straight line was made with slope= -0.3045
A solution of AgNO3 is mixed with NaCl to form a solution that is 0.10 M in AgNO3 and 0.075 M in NaCl. What will happen once these solutions are mixed
Sodium bisulfite solution is added to an experiment at the end in order to destroy the unreacted bromine. What reaction is occuring here? Is HSO3- acting as an oxidizing or reducing agent? Write a balanced equation.
Explain why higher levels of defects are found in solids at high temperatures and close to their melting points.
Derive the rate law, and show that this reaction may follow the first-order equation at high pressures and the second-order equation at low pressures.
Briefly explain how a lake with a limestone bed is more resistant to pH changes than a lake with a granite bed
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