9 Answered Questions for the topic Chemical Equations


Sodium hydroxide is used extensively in acid-base titrations because it is a strong, inexpensive base. A sodium hydroxide solution was standardized by titrating 42.18 mL of 0.1753 M...

standard hydrochloric acid. The initial buret reading of the sodium hydroxide was 1.08 mL, and the final reading was 31.51 mL. What was the molarity of the base solution? I got 0.2212 M but it... more


The mass percent of Cl− in a seawater sample is determined by titrating 25.00 mL of seawater with AgNO3 solution, causing a precipitation reaction....

An indicator is used to detect the endpoint, which occurs when a free Ag+ ion is present in a solution after all the Cl− has reacted. If 57.50 mL of 0.2036 M AgNO3 is required to reach the... more
Chemical Equations Math Chemistry


what is the ΔS Zn of this equation (s) + HCl (aq) → ZnCl2 (aq) + H2 (g)

is it positive or negative
Chemical Equations Chemistry


How to solve chemical equations? For eg: mg+2Hcl MgCL2+H2

Plsss solve
Chemical Equations Science Biology Chemistry


how do i deduce the moles of the acid reacted with sodium carbonate

The balanced equation is: Na2CO3 + 2HCl ----> 2NaCl + H2O + CO2Moles of sodium carbonate: 0.03945average volume of acid added: 26.3 cm3Acid = HClThis is standardisation of an acid (titration 1)


What does a double-headed arrow mean in a chemical equation?? PLEASE HELP!!! I AM LOST?

I am doing a lab where the chemical reaction is Fe^+3 (aq) + NCS^-1 (aq)<---      FeNCS^+2 (aq)                                                                                                  ... more

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