20.0 mL of 0.2 M CaCl_{2} diluted with water to 100.0 mL. Calculate [CaCl_{2}], [Ca^{2+}] and [Cl^{-}].
Produce from concentrated hydrochloric acid (12 M) 3.0 L 0.60 M HCl solution. How large a volume of concentrated hydrochloric acid should be used? Write down all calculations with units.
Of a 2.0 M NaOH solution should be produced 0.5 L 0.1 M NaOH solution. How large a volume of 2.0 M NaOH must be used? Write down all calculations with units.
From a 2.5 M HCl solution is transferred 5 mL to a 50 mL volumetric flask. Make water in the flask to the mark. What is the concentration of HCl in the flask? Write down all calculations with units.
In a light lager alcohol content is 1.8% w / w. d = 1.00 g / mL. A plain. beer contains 0.33 L.
How many grams of ethanol in a light lager and enter the result with the correct number of significant digits?
Calculate the [ethanol] (mol/L) in a light lager? (Methanol = 46.07 g/mol). Enter the result with the correct number of significant digits.
Sodium thiosulfate reacts with silver halide to form natriumbromid and natriumsølvthiosulfat, Na_{3}[Ag (S_{2}O_{3})_{2}].
2 Na_{2}S_{2}O_{3} (aq) + AgBr (s) → NaBr (aq) + Na_{3} [Ag (S_{2}O_{3})_{2}] (aq)
1. How many moles Na_{2}S_{2}O_{3} react with 1.0 mg of AgBr. Enter the result with 3 significant digits.
2. Calculate how much silver halide is required to produce 0.033 mol Na_{3} [Ag(S2O3)_{2}]. Enter the result with 3 significant digits.