Which of the following is the conjugate acid of the biphosphate ion (HPO_4^2-)?

Question

Which of the following is the conjugate acid of the biphosphate ion (HPO_4^2-)? a.) H_3PO_4 b.) H_2 PO_4^- c.) HPO_4^2- d.) PO_4^3- Which of the following is the most ideal condition for a gas? a.) High temperature, high pressure b.) Low temperature, low pressure c.) High temperature, low pressure d.) Low temperature, high pressure "Pressure of a gas is inversely proportional to the volume, other conditions remaining a.) Avogadro's law b.) Ideal gas law c.) Boyle's law d.) Charles' law What is the mass percent of a solution that has 25.0 g of NaCl dissolved in 100.0 g of a.) 12.5 % b.) 25.0 % c.) 10.5 % d.) 20 % How many grams of HCI are in 25.00 ml of a 0.114 M solution? a.) 7.82 times 10^-5 g b.) 0.104g c.) 166g d.) 103.9g Normal boiling point of 100g of H_2O after 0.043 moles of glucose (C_6H_12O_6) is added is? a.) 99.78 degree C b.) 94.42 degree C c.) 105.58 degree C d.) 100.22 degree C What is the limiting reagent when 100 mL 0.25M of Ba(OH)_2 is mixed with 100 mL of a.) H_2O b.) Ba_3(PO_4)_2 c.) Ba(OH)_2 d.) H_3PO_4 What is the identity an unknown gas given that 10.68g of the gas occupies 7.47 L at b) Sulfur c) Argon d) Water Vapor is the pH of a 0.350 M barium hydroxide, Ba(OH)_2 solution? 10^-14 b) 13.8 c) 0.700 d) 0.155

Explanation / Answer

Ans 1 b) H2PO4-

The conjugate acid of a base has one proton more than it. The conjugate acids lose proton to form base.

So the conjugate acid of HPO42- is H2PO4-

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