Although the formula of this new chemical is a trade secret, it can be revealed that the formula for Herbigon is X-acetate (XCH3COO, where "X" represents the top-secret cation of the salt). It is this cation that kills weeds. Since it is critical to have Herbigon dissolved (it won't kill weeds as a suspension), you are working on adjusting the pH so Herbigon will be soluble at the concentration needed to kill weeds. What pH must the solution have to yield a solution in which the concentration of X+ is 3.50×10⁻³M ? The pKa of acetic acid is 4.76.

what is the molar concentration of 2-methylbutanol in its neat solution?

1) Determine the volume (liters) of 0.500 M NaOH solution required to neutralize 1.75 L of 0.250 M H2SO4. The neutralization reaction is: H2SO4 (aq) + 2NaOH (aq) → Na2SO4 (aq) + 2 H2O (l) Determine the volume (liters) of 0.500 M NaOH solution required to neutralize 1.75 L of 0.250 M H2SO4. The neutralization reaction is: H2SO4 (aq) + 2NaOH (aq) → Na2SO4 (aq) + 2 H2O (l) 7.00 0.875 1.75 0.438 none of the above

2) How many moles of HNO3 are present if 7.80×10−2 mol of Ba(OH)2 was needed to neutralize the acid solution? Express your answer with the appropriate units.

3)What is the final volume in milliliters when 0.919 L of a 41.5 % (m/v) solution is diluted to 21.8 % (m/v)?

please help with these problems and please show me how you got the answer

A 1.20-L contains 1.10 g of an unknown gas at STP . what is the molecular weight of the unknown gas?

Which of the following will increase the amount of product present at equilibrium for the reaction: 2A(g) B(g) AH 84 and K 1.3 x 103. (Chhose all correct answers) A) decrease the temperature B) decrease the volume of the reactino vessel C) Increase the temperature D) add a catalyst E) Increase the pressure by adding argon F) increase the pressure of A G) increase the volume of the reaction vesse

An organic liquid is a mixture of methyl alcohol (CH3OH) and ethyl alcohol (C2H5OH). A 0.220-g sample of the liquid is burned in an excess of O2(g) and yields 0.376 g CO2(g) (carbon dioxide).

Set up two algebraic equations, one expressing the mass of carbon dioxide produced in terms of each reagent and the other expressing the mass of sample burned in terms of each reagent. What is the mass of methyl alcohol (CH3OH) in the sample?

1. Explain how Cl⁻ can be determined by cathodic stripping voltammetry at a silver-working electrode.

6.

Open the PhET States of Matter Simulation to answer the following questions:

(a) Select the Solid, Liquid, Gas tab. Explore by selecting different substances, heating and cooling the systems, and changing the state. What similarities do you notice between the four substances for each phase (solid, liquid, gas)? What differences do you notice?

(b) For each substance, select each of the states and record the given temperatures. How do the given temperatures for each state correlate with the strengths of their intermolecular attractions? Explain.

(c) Select the Interaction Potential tab, and use the default neon atoms. Move the Ne atom on the right and observe how the potential energy changes. Select the Total Force button, and move the Ne atom as before. When is the total force on each atom attractive and large enough to matter? Then select the Component Forces button, and move the Ne atom. When do the attractive (van der Waals) and repulsive (electron overlap) forces balance? How does this relate to the potential energy versus the distance between atoms graph? Explain.

A beaker with 115 mL of an acetic acid buffer with a pH of 5.000 is sitting on a bench top. The total molarity of acid and conjugate base in this buffer is 0.100 M. A student adds 4.80 mL of a 0.420 M HCl solution to the beaker. How much will the pH change? The pKa of acetic acid is 4.740. Express your answer numerically to two decimal places. Use a minus ( − ) sign if the pH has decreased.

Indicate whether or not each of the following ionic compounds will undergo hydrolysis and predict whether the resulting solution pH will be acidic, basic, or indeterminate (both ions undergo hydrolysis).

(a) NH4ClO4

acidic hydrolysis

basic hydrolysis

indeterminate hydrolysis

no hydrolysis

(b) LiBr

acidic hydrolysis

basic hydrolysis

indeterminate hydrolysis

no hydrolysis

(c) PbSO4

acidic hydrolysis

basic hydrolysis

indeterminate hydrolysis

no hydrolysis

(d) Co(ClO3)2

acidic hydrolysis

basic hydrolysis

indeterminate hydrolysis

no hydrolysis

You may have heard that ice skaters actually skate on a thin layer of water rather than solid ice (which reduces friction on the blade and allows them to skate faster). Let’s work through a calculation to determine if this statement is reasonable. Estimate the pressure exerted by a 200-lb hockey player, standing on two blades that are 0.1 mm  20 cm. Calculate the melting point of ice below the player, assuming that the density of ice under these conditions is approximately 0.915 g cm^–3 and that of liquid water is 0.998 g cm^–3. Assuming a typical temperature of ice in a skating rink is 27 °F, does a hockey player skate on ice or water?

Chelating agents are important for many biological processes. List and describe three such processes.

For each of the following five reactions, circle the specific chemical species that is: reduced, and draw a box around the specific chemical species that is oxidized:

a) MnO₂ (s) + 2 I^- (aq) +4 H⁺ (aq) --> Mn²⁺ (aq) + I₂ (aq) + 2 H₂O (l)
b) Cd (s) + 2 NiO(OH) (s) + 2 H₂O (l) --> 2 Ni(OH)₂ (s) + Cd(OH)₂ (s)
c) NH₄⁺ (aq) + 2 O₂ (g) --> NO₃^- (aq) + 2 H⁺ (aq) + H₂O (l)
d) 2 CuFeS₂ (s) + 4 O₂ (g) --> Cu₂S (s) + 2 FeO (s) + 3 SO₂ (g)
e) 2 K₂FeO₄ (aq) + 3 Zn (s) --> Fe₂O₃ (s) + ZnO (s) + 2 K₂ZnO₂ (aq)