A 1.248-g sample of limestone rock is pulverized and then treated with 30.00 mL of 1.035 M HCl solution. The excess acid then requires 11.56 mL of 1.010 M NaOH for neutralization. Calculate the percentage by mass of calcium carbonate in the rock, assuming that it is the only substance reacting with the HCl solution.

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Trinidad TremblayLv2

14 May 2020

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A 0.5895-g sample of impure magnesium hydroxide is dissolved in 100.0 mL of 0.2050 M HCl solution. The excess acid then needs 19.85 mL of 0.1020 M NaOH for neutralization. Calculate the percentage by mass of magnesium hydroxide in the sample, assuming that it is the only substance reacting with the HCl solution.

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A 0.5895-g sample of impure magnesium hydroxide is dis- solvedin 100.0 mL of 0.2050 M HCl solution. The excess acid then needs19.85 mL of 0.1020 M NaOH for neutralization. Calculate the percentby mass of magnesium hydroxide in the sample, assuming that it isthe only substance reacting with the HCl solution.

A 0.5895-gram sample of impure magnesium hydroxide is dissolved in 100.0 mL of 0.2050 M HCl. The excess acid then needs 19.85 mL of 0.1020 M NaOH for neutralization. Calculate the percent by mass of magnesium hydroxide in the sample, assuming that it is the only substance reacting with the HCl solution.