If 21 mL of 3.2 x 10–5 M magnesium chloride and 15 mL of 1.5 x 10–4 M sodium fluoride are mixed, what are the concentrations of magnesium ion, chloride ion, sodium ion, and fluoride ion after mixing? Some choices may be used more than once, and keep an extra sig fig.   Question 9 options:     chloride ion     sodium ion     magnesium ion     fluoride ion   1.   1.87 x 10–5 M 2.   3.73 x 10–5 M 3.   6.25 x 10–5 M 4.   1.25 x 10–4 M 5.   1.50 x 10–4 M 6.   3.20 x 10–5 M 7.   1.50 x 10–4 M Answer and Explain

If the above reaction involves the monoprotic acid potassium hydrogen phthalate (KHP, molar mass = 204.2) and NaOH, calculate the amount of KHP (in grams) needed to react with 20. mL of a 0.10 M NaOH solution.

(Write the formula of any new substance or substances produced in considerable amounts when solutions of the following are mixed. Don't list ions already present. If no reaction takes place write "no reaction". Assume soluble substances that are being mixed are in solution.)  Write the reaction (if any) that occurs between the two substances Mercuric nitrate + sodium chloride  Lead nitrate + excess ammonium hydroxide Silver chloride + 6M nitric acid Silver chloride + 6M NH4OH Lead nitrate + potassium chromate Mercurous chloride + ammonium hydroxide

A student needs to dilute a 0.25 M Pb(NO3)2 solution to make 63.0 mL of 0.19 M Pb(NO3)2. Set up the calculation by placing the values with the correct units into the equation. Then, calculate the volume, in milliliters, of the 0.25 M Pb(NO3)2 solution that is needed. X Answer Bank 0.19 M 0.19 mL 63.0 L 0.25 M 63.0 mL 0.25 mL mL

What’s the answer in M

A student is asked to standardize a solution of barium hydroxide. He weighs out 0.929 g potassium hydrogen phthalate ( KHC8H404, treat this as a monoprotic acid). It requires 36.8 mL of barium hydroxide to reach the endpoint. A. What is the molarity of the barium hydroxide solution? M This barium hydroxide solution is then used to titrate an unknown solution of hydrobromic acid. B. If 28.5 mL of the barium hydroxide solution is required to neutralize 13.3 mL of hydrobromic acid, what is the molarity of the hydrobromic acid solution? M

A solution contains Cr3+ and Mg2+. The addition of 1.00 L of 1.53 M NaF solution is required to cause the complete precipitation of these ions as CrF3(s) and MgF2(s). The total mass of the precipitate is 50.0 g . Find the mass of Cr3+ in the original solution.

A student needs to dilute a 0.40 M Pb(NO3)₂ solution to make 75.0 mL of 0.16 M Pb(NO3)2. Set up the calculation by placing the values with the correct units into the equation. Then, calculate the volume, in milliliters, of the 0.40 M Pb(NO3)₂ solution that is needed. 75.0 mL 75.0 L Answer Bank 0.40 M 0.16 mL 0.16 M 0.40 mL = mL

Please don't provide handwritten solution ....

A 0.430 g sample of a monoprotic acid is dissolved in water and titrated with 0.110 M KOH. What is the molar mass of the acid if 31.0 mL of the KOH solution is required to neutralize the sample? molar mass: g/mol **** -0 -1 2 -3 -4 6 -7 9 10 11 12 13 15 16 17 18 19 20 -21 22 23